diff --git a/gfx/gl/GLBlitHelperD3D.cpp b/gfx/gl/GLBlitHelperD3D.cpp
index 8dda3e45fd37..2c4e96719e04 100644
--- a/gfx/gl/GLBlitHelperD3D.cpp
+++ b/gfx/gl/GLBlitHelperD3D.cpp
@@ -16,6 +16,7 @@
 #include "mozilla/layers/D3D11ShareHandleImage.h"
 #include "mozilla/layers/D3D11TextureIMFSampleImage.h"
 #include "mozilla/layers/D3D11YCbCrImage.h"
+#include "mozilla/layers/GpuProcessD3D11TextureMap.h"
 #include "mozilla/layers/TextureD3D11.h"
 #include "mozilla/StaticPrefs_gl.h"
 
diff --git a/gfx/ipc/GPUParent.cpp b/gfx/ipc/GPUParent.cpp
index f13e5d91e03e..d8705880f702 100644
--- a/gfx/ipc/GPUParent.cpp
+++ b/gfx/ipc/GPUParent.cpp
@@ -73,6 +73,7 @@
 #  include "gfxWindowsPlatform.h"
 #  include "mozilla/WindowsVersion.h"
 #  include "mozilla/gfx/DeviceManagerDx.h"
+#  include "mozilla/layers/GpuProcessD3D11TextureMap.h"
 #  include "mozilla/layers/TextureD3D11.h"
 #  include "mozilla/widget/WinCompositorWindowThread.h"
 #else
diff --git a/gfx/layers/d3d11/GpuProcessD3D11TextureMap.cpp b/gfx/layers/d3d11/GpuProcessD3D11TextureMap.cpp
new file mode 100644
index 000000000000..d5a0f5a82caf
--- /dev/null
+++ b/gfx/layers/d3d11/GpuProcessD3D11TextureMap.cpp
@@ -0,0 +1,193 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "GpuProcessD3D11TextureMap.h"
+
+#include "mozilla/layers/D3D11TextureIMFSampleImage.h"
+#include "mozilla/layers/HelpersD3D11.h"
+
+namespace mozilla {
+
+namespace layers {
+
+StaticAutoPtr<GpuProcessD3D11TextureMap> GpuProcessD3D11TextureMap::sInstance;
+
+/* static */
+void GpuProcessD3D11TextureMap::Init() {
+  MOZ_ASSERT(XRE_IsGPUProcess());
+  sInstance = new GpuProcessD3D11TextureMap();
+}
+
+/* static */
+void GpuProcessD3D11TextureMap::Shutdown() {
+  MOZ_ASSERT(XRE_IsGPUProcess());
+  sInstance = nullptr;
+}
+
+/* static */
+GpuProcessTextureId GpuProcessD3D11TextureMap::GetNextTextureId() {
+  MOZ_ASSERT(XRE_IsGPUProcess());
+  return GpuProcessTextureId::GetNext();
+}
+
+GpuProcessD3D11TextureMap::GpuProcessD3D11TextureMap()
+    : mD3D11TexturesById("D3D11TextureMap::mD3D11TexturesById") {}
+
+GpuProcessD3D11TextureMap::~GpuProcessD3D11TextureMap() {}
+
+void GpuProcessD3D11TextureMap::Register(
+    GpuProcessTextureId aTextureId, ID3D11Texture2D* aTexture,
+    uint32_t aArrayIndex, const gfx::IntSize& aSize,
+    RefPtr<IMFSampleUsageInfo> aUsageInfo) {
+  MOZ_RELEASE_ASSERT(aTexture);
+  MOZ_RELEASE_ASSERT(aUsageInfo);
+
+  auto textures = mD3D11TexturesById.Lock();
+
+  auto it = textures->find(aTextureId);
+  if (it != textures->end()) {
+    MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+    return;
+  }
+  textures->emplace(aTextureId,
+                    TextureHolder(aTexture, aArrayIndex, aSize, aUsageInfo));
+}
+
+void GpuProcessD3D11TextureMap::Unregister(GpuProcessTextureId aTextureId) {
+  auto textures = mD3D11TexturesById.Lock();
+
+  auto it = textures->find(aTextureId);
+  if (it == textures->end()) {
+    return;
+  }
+  textures->erase(it);
+}
+
+RefPtr<ID3D11Texture2D> GpuProcessD3D11TextureMap::GetTexture(
+    GpuProcessTextureId aTextureId) {
+  auto textures = mD3D11TexturesById.Lock();
+
+  auto it = textures->find(aTextureId);
+  if (it == textures->end()) {
+    return nullptr;
+  }
+
+  return it->second.mTexture;
+}
+
+Maybe<HANDLE> GpuProcessD3D11TextureMap::GetSharedHandleOfCopiedTexture(
+    GpuProcessTextureId aTextureId) {
+  TextureHolder holder;
+  {
+    auto textures = mD3D11TexturesById.Lock();
+
+    auto it = textures->find(aTextureId);
+    if (it == textures->end()) {
+      return Nothing();
+    }
+
+    if (it->second.mCopiedTextureSharedHandle.isSome()) {
+      return it->second.mCopiedTextureSharedHandle;
+    }
+
+    holder = it->second;
+  }
+
+  RefPtr<ID3D11Device> device;
+  holder.mTexture->GetDevice(getter_AddRefs(device));
+  if (!device) {
+    return Nothing();
+  }
+
+  RefPtr<ID3D11DeviceContext> context;
+  device->GetImmediateContext(getter_AddRefs(context));
+  if (!context) {
+    return Nothing();
+  }
+
+  CD3D11_TEXTURE2D_DESC newDesc(
+      DXGI_FORMAT_NV12, holder.mSize.width, holder.mSize.height, 1, 1,
+      D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE);
+  newDesc.MiscFlags = D3D11_RESOURCE_MISC_SHARED;
+
+  RefPtr<ID3D11Texture2D> copiedTexture;
+  HRESULT hr =
+      device->CreateTexture2D(&newDesc, nullptr, getter_AddRefs(copiedTexture));
+  if (FAILED(hr)) {
+    return Nothing();
+  }
+
+  D3D11_TEXTURE2D_DESC inDesc;
+  holder.mTexture->GetDesc(&inDesc);
+
+  D3D11_TEXTURE2D_DESC outDesc;
+  copiedTexture->GetDesc(&outDesc);
+
+  UINT height = std::min(inDesc.Height, outDesc.Height);
+  UINT width = std::min(inDesc.Width, outDesc.Width);
+  D3D11_BOX srcBox = {0, 0, 0, width, height, 1};
+
+  context->CopySubresourceRegion(copiedTexture, 0, 0, 0, 0, holder.mTexture,
+                                 holder.mArrayIndex, &srcBox);
+
+  RefPtr<IDXGIResource> resource;
+  copiedTexture->QueryInterface((IDXGIResource**)getter_AddRefs(resource));
+  if (!resource) {
+    return Nothing();
+  }
+
+  HANDLE sharedHandle;
+  hr = resource->GetSharedHandle(&sharedHandle);
+  if (FAILED(hr)) {
+    return Nothing();
+  }
+
+  RefPtr<ID3D11Query> query;
+  CD3D11_QUERY_DESC desc(D3D11_QUERY_EVENT);
+  hr = device->CreateQuery(&desc, getter_AddRefs(query));
+  if (FAILED(hr) || !query) {
+    gfxWarning() << "Could not create D3D11_QUERY_EVENT: " << gfx::hexa(hr);
+    return Nothing();
+  }
+
+  context->End(query);
+
+  BOOL result;
+  bool ret = WaitForFrameGPUQuery(device, context, query, &result);
+  if (!ret) {
+    gfxCriticalNoteOnce << "WaitForFrameGPUQuery() failed";
+  }
+
+  {
+    auto textures = mD3D11TexturesById.Lock();
+
+    auto it = textures->find(aTextureId);
+    if (it == textures->end()) {
+      MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+      return Nothing();
+    }
+
+    // Disable no video copy for future decoded video frames. Since
+    // GetSharedHandleOfCopiedTexture() is slow.
+    it->second.mIMFSampleUsageInfo->DisableZeroCopyNV12Texture();
+
+    it->second.mCopiedTexture = copiedTexture;
+    it->second.mCopiedTextureSharedHandle = Some(sharedHandle);
+  }
+
+  return Some(sharedHandle);
+}
+
+GpuProcessD3D11TextureMap::TextureHolder::TextureHolder(
+    ID3D11Texture2D* aTexture, uint32_t aArrayIndex, const gfx::IntSize& aSize,
+    RefPtr<IMFSampleUsageInfo> aUsageInfo)
+    : mTexture(aTexture),
+      mArrayIndex(aArrayIndex),
+      mSize(aSize),
+      mIMFSampleUsageInfo(aUsageInfo) {}
+
+}  // namespace layers
+}  // namespace mozilla
diff --git a/gfx/layers/d3d11/GpuProcessD3D11TextureMap.h b/gfx/layers/d3d11/GpuProcessD3D11TextureMap.h
new file mode 100644
index 000000000000..96668fa1b895
--- /dev/null
+++ b/gfx/layers/d3d11/GpuProcessD3D11TextureMap.h
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_GFX_GpuProcessD3D11TextureMap_H
+#define MOZILLA_GFX_GpuProcessD3D11TextureMap_H
+
+#include <d3d11.h>
+#include <unordered_map>
+
+#include "mozilla/DataMutex.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/layers/LayersTypes.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/StaticPtr.h"
+
+namespace mozilla {
+namespace layers {
+
+class IMFSampleUsageInfo;
+
+/**
+ * A class to manage ID3D11Texture2Ds that is shared without using shared handle
+ * in GPU process. On some GPUs, ID3D11Texture2Ds of hardware decoded video
+ * frames with zero video frame copy could not use shared handle.
+ */
+class GpuProcessD3D11TextureMap {
+ public:
+  static void Init();
+  static void Shutdown();
+  static GpuProcessD3D11TextureMap* Get() { return sInstance; }
+  static GpuProcessTextureId GetNextTextureId();
+
+  GpuProcessD3D11TextureMap();
+  ~GpuProcessD3D11TextureMap();
+
+  void Register(GpuProcessTextureId aTextureId, ID3D11Texture2D* aTexture,
+                uint32_t aArrayIndex, const gfx::IntSize& aSize,
+                RefPtr<IMFSampleUsageInfo> aUsageInfo);
+  void Unregister(GpuProcessTextureId aTextureId);
+
+  RefPtr<ID3D11Texture2D> GetTexture(GpuProcessTextureId aTextureId);
+  Maybe<HANDLE> GetSharedHandleOfCopiedTexture(GpuProcessTextureId aTextureId);
+
+ private:
+  struct TextureHolder {
+    TextureHolder(ID3D11Texture2D* aTexture, uint32_t aArrayIndex,
+                  const gfx::IntSize& aSize,
+                  RefPtr<IMFSampleUsageInfo> aUsageInfo);
+    TextureHolder() = default;
+
+    RefPtr<ID3D11Texture2D> mTexture;
+    uint32_t mArrayIndex = 0;
+    gfx::IntSize mSize;
+    RefPtr<IMFSampleUsageInfo> mIMFSampleUsageInfo;
+    RefPtr<ID3D11Texture2D> mCopiedTexture;
+    Maybe<HANDLE> mCopiedTextureSharedHandle;
+  };
+
+  DataMutex<std::unordered_map<GpuProcessTextureId, TextureHolder,
+                               GpuProcessTextureId::HashFn>>
+      mD3D11TexturesById;
+
+  static StaticAutoPtr<GpuProcessD3D11TextureMap> sInstance;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif /* MOZILLA_GFX_GpuProcessD3D11TextureMap_H */
diff --git a/gfx/layers/d3d11/TextureD3D11.cpp b/gfx/layers/d3d11/TextureD3D11.cpp
index 675d40c62f23..009d38e55c42 100644
--- a/gfx/layers/d3d11/TextureD3D11.cpp
+++ b/gfx/layers/d3d11/TextureD3D11.cpp
@@ -20,6 +20,7 @@
 #include "mozilla/gfx/gfxVars.h"
 #include "mozilla/layers/CompositorBridgeChild.h"
 #include "mozilla/layers/D3D11TextureIMFSampleImage.h"
+#include "mozilla/layers/GpuProcessD3D11TextureMap.h"
 #include "mozilla/layers/HelpersD3D11.h"
 #include "mozilla/webrender/RenderD3D11TextureHost.h"
 #include "mozilla/webrender/RenderThread.h"
@@ -1778,181 +1779,5 @@ void SyncObjectD3D11ClientContentDevice::EnsureInitialized() {
   mContentDevice = DeviceManagerDx::Get()->GetContentDevice();
 }
 
-StaticAutoPtr<GpuProcessD3D11TextureMap> GpuProcessD3D11TextureMap::sInstance;
-
-/* static */
-void GpuProcessD3D11TextureMap::Init() {
-  MOZ_ASSERT(XRE_IsGPUProcess());
-  sInstance = new GpuProcessD3D11TextureMap();
-}
-
-/* static */
-void GpuProcessD3D11TextureMap::Shutdown() {
-  MOZ_ASSERT(XRE_IsGPUProcess());
-  sInstance = nullptr;
-}
-
-/* static */
-GpuProcessTextureId GpuProcessD3D11TextureMap::GetNextTextureId() {
-  MOZ_ASSERT(XRE_IsGPUProcess());
-  return GpuProcessTextureId::GetNext();
-}
-
-GpuProcessD3D11TextureMap::GpuProcessD3D11TextureMap()
-    : mD3D11TexturesById("D3D11TextureMap::mD3D11TexturesById") {}
-
-GpuProcessD3D11TextureMap::~GpuProcessD3D11TextureMap() {}
-
-void GpuProcessD3D11TextureMap::Register(
-    GpuProcessTextureId aTextureId, ID3D11Texture2D* aTexture,
-    uint32_t aArrayIndex, const gfx::IntSize& aSize,
-    RefPtr<IMFSampleUsageInfo> aUsageInfo) {
-  MOZ_RELEASE_ASSERT(aTexture);
-  MOZ_RELEASE_ASSERT(aUsageInfo);
-
-  auto textures = mD3D11TexturesById.Lock();
-
-  auto it = textures->find(aTextureId);
-  if (it != textures->end()) {
-    MOZ_ASSERT_UNREACHABLE("unexpected to be called");
-    return;
-  }
-  textures->emplace(aTextureId,
-                    TextureHolder(aTexture, aArrayIndex, aSize, aUsageInfo));
-}
-
-void GpuProcessD3D11TextureMap::Unregister(GpuProcessTextureId aTextureId) {
-  auto textures = mD3D11TexturesById.Lock();
-
-  auto it = textures->find(aTextureId);
-  if (it == textures->end()) {
-    return;
-  }
-  textures->erase(it);
-}
-
-RefPtr<ID3D11Texture2D> GpuProcessD3D11TextureMap::GetTexture(
-    GpuProcessTextureId aTextureId) {
-  auto textures = mD3D11TexturesById.Lock();
-
-  auto it = textures->find(aTextureId);
-  if (it == textures->end()) {
-    return nullptr;
-  }
-
-  return it->second.mTexture;
-}
-
-Maybe<HANDLE> GpuProcessD3D11TextureMap::GetSharedHandleOfCopiedTexture(
-    GpuProcessTextureId aTextureId) {
-  TextureHolder holder;
-  {
-    auto textures = mD3D11TexturesById.Lock();
-
-    auto it = textures->find(aTextureId);
-    if (it == textures->end()) {
-      return Nothing();
-    }
-
-    if (it->second.mCopiedTextureSharedHandle.isSome()) {
-      return it->second.mCopiedTextureSharedHandle;
-    }
-
-    holder = it->second;
-  }
-
-  RefPtr<ID3D11Device> device;
-  holder.mTexture->GetDevice(getter_AddRefs(device));
-  if (!device) {
-    return Nothing();
-  }
-
-  RefPtr<ID3D11DeviceContext> context;
-  device->GetImmediateContext(getter_AddRefs(context));
-  if (!context) {
-    return Nothing();
-  }
-
-  CD3D11_TEXTURE2D_DESC newDesc(
-      DXGI_FORMAT_NV12, holder.mSize.width, holder.mSize.height, 1, 1,
-      D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE);
-  newDesc.MiscFlags = D3D11_RESOURCE_MISC_SHARED;
-
-  RefPtr<ID3D11Texture2D> copiedTexture;
-  HRESULT hr =
-      device->CreateTexture2D(&newDesc, nullptr, getter_AddRefs(copiedTexture));
-  if (FAILED(hr)) {
-    return Nothing();
-  }
-
-  D3D11_TEXTURE2D_DESC inDesc;
-  holder.mTexture->GetDesc(&inDesc);
-
-  D3D11_TEXTURE2D_DESC outDesc;
-  copiedTexture->GetDesc(&outDesc);
-
-  UINT height = std::min(inDesc.Height, outDesc.Height);
-  UINT width = std::min(inDesc.Width, outDesc.Width);
-  D3D11_BOX srcBox = {0, 0, 0, width, height, 1};
-
-  context->CopySubresourceRegion(copiedTexture, 0, 0, 0, 0, holder.mTexture,
-                                 holder.mArrayIndex, &srcBox);
-
-  RefPtr<IDXGIResource> resource;
-  copiedTexture->QueryInterface((IDXGIResource**)getter_AddRefs(resource));
-  if (!resource) {
-    return Nothing();
-  }
-
-  HANDLE sharedHandle;
-  hr = resource->GetSharedHandle(&sharedHandle);
-  if (FAILED(hr)) {
-    return Nothing();
-  }
-
-  RefPtr<ID3D11Query> query;
-  CD3D11_QUERY_DESC desc(D3D11_QUERY_EVENT);
-  hr = device->CreateQuery(&desc, getter_AddRefs(query));
-  if (FAILED(hr) || !query) {
-    gfxWarning() << "Could not create D3D11_QUERY_EVENT: " << gfx::hexa(hr);
-    return Nothing();
-  }
-
-  context->End(query);
-
-  BOOL result;
-  bool ret = WaitForFrameGPUQuery(device, context, query, &result);
-  if (!ret) {
-    gfxCriticalNoteOnce << "WaitForFrameGPUQuery() failed";
-  }
-
-  {
-    auto textures = mD3D11TexturesById.Lock();
-
-    auto it = textures->find(aTextureId);
-    if (it == textures->end()) {
-      MOZ_ASSERT_UNREACHABLE("unexpected to be called");
-      return Nothing();
-    }
-
-    // Disable no video copy for future decoded video frames. Since
-    // GetSharedHandleOfCopiedTexture() is slow.
-    it->second.mIMFSampleUsageInfo->DisableZeroCopyNV12Texture();
-
-    it->second.mCopiedTexture = copiedTexture;
-    it->second.mCopiedTextureSharedHandle = Some(sharedHandle);
-  }
-
-  return Some(sharedHandle);
-}
-
-GpuProcessD3D11TextureMap::TextureHolder::TextureHolder(
-    ID3D11Texture2D* aTexture, uint32_t aArrayIndex, const gfx::IntSize& aSize,
-    RefPtr<IMFSampleUsageInfo> aUsageInfo)
-    : mTexture(aTexture),
-      mArrayIndex(aArrayIndex),
-      mSize(aSize),
-      mIMFSampleUsageInfo(aUsageInfo) {}
-
 }  // namespace layers
 }  // namespace mozilla
diff --git a/gfx/layers/d3d11/TextureD3D11.h b/gfx/layers/d3d11/TextureD3D11.h
index 2947f114a8ca..1b64fc52f823 100644
--- a/gfx/layers/d3d11/TextureD3D11.h
+++ b/gfx/layers/d3d11/TextureD3D11.h
@@ -599,51 +599,6 @@ class D3D11MTAutoEnter {
   RefPtr<ID3D10Multithread> mMT;
 };
 
-/**
- * A class to manage ID3D11Texture2Ds that is shared without using shared handle
- * in GPU process. On some GPUs, ID3D11Texture2Ds of hardware decoded video
- * frames with zero video frame copy could not use shared handle.
- */
-class GpuProcessD3D11TextureMap {
- public:
-  static void Init();
-  static void Shutdown();
-  static GpuProcessD3D11TextureMap* Get() { return sInstance; }
-  static GpuProcessTextureId GetNextTextureId();
-
-  GpuProcessD3D11TextureMap();
-  ~GpuProcessD3D11TextureMap();
-
-  void Register(GpuProcessTextureId aTextureId, ID3D11Texture2D* aTexture,
-                uint32_t aArrayIndex, const gfx::IntSize& aSize,
-                RefPtr<IMFSampleUsageInfo> aUsageInfo);
-  void Unregister(GpuProcessTextureId aTextureId);
-
-  RefPtr<ID3D11Texture2D> GetTexture(GpuProcessTextureId aTextureId);
-  Maybe<HANDLE> GetSharedHandleOfCopiedTexture(GpuProcessTextureId aTextureId);
-
- private:
-  struct TextureHolder {
-    TextureHolder(ID3D11Texture2D* aTexture, uint32_t aArrayIndex,
-                  const gfx::IntSize& aSize,
-                  RefPtr<IMFSampleUsageInfo> aUsageInfo);
-    TextureHolder() = default;
-
-    RefPtr<ID3D11Texture2D> mTexture;
-    uint32_t mArrayIndex = 0;
-    gfx::IntSize mSize;
-    RefPtr<IMFSampleUsageInfo> mIMFSampleUsageInfo;
-    RefPtr<ID3D11Texture2D> mCopiedTexture;
-    Maybe<HANDLE> mCopiedTextureSharedHandle;
-  };
-
-  DataMutex<std::unordered_map<GpuProcessTextureId, TextureHolder,
-                               GpuProcessTextureId::HashFn>>
-      mD3D11TexturesById;
-
-  static StaticAutoPtr<GpuProcessD3D11TextureMap> sInstance;
-};
-
 }  // namespace layers
 }  // namespace mozilla
 
diff --git a/gfx/layers/moz.build b/gfx/layers/moz.build
index 8b1277c2daaa..45586ad7e706 100644
--- a/gfx/layers/moz.build
+++ b/gfx/layers/moz.build
@@ -40,11 +40,13 @@ if CONFIG["MOZ_WIDGET_TOOLKIT"] == "windows":
         EXPORTS.mozilla.layers += [
             "d3d11/CompositorD3D11.h",
             "d3d11/DeviceAttachmentsD3D11.h",
+            "d3d11/GpuProcessD3D11TextureMap.h",
             "d3d11/HelpersD3D11.h",
             "d3d11/ShaderDefinitionsD3D11.h",
             "d3d11/TextureD3D11.h",
         ]
         UNIFIED_SOURCES += [
+            "d3d11/GpuProcessD3D11TextureMap.cpp",
             "d3d11/TextureD3D11.cpp",
         ]
         SOURCES += [
diff --git a/gfx/webrender_bindings/RenderD3D11TextureHost.cpp b/gfx/webrender_bindings/RenderD3D11TextureHost.cpp
index c53f77949651..b79aeb343b49 100644
--- a/gfx/webrender_bindings/RenderD3D11TextureHost.cpp
+++ b/gfx/webrender_bindings/RenderD3D11TextureHost.cpp
@@ -14,6 +14,7 @@
 #include "ScopedGLHelpers.h"
 #include "mozilla/DebugOnly.h"
 #include "mozilla/gfx/Logging.h"
+#include "mozilla/layers/GpuProcessD3D11TextureMap.h"
 #include "mozilla/layers/TextureD3D11.h"
 
 namespace mozilla {