diff --git a/dom/ipc/PBrowser.ipdl b/dom/ipc/PBrowser.ipdl
index 4980b44e6d3d..d1cd7ae86d39 100644
--- a/dom/ipc/PBrowser.ipdl
+++ b/dom/ipc/PBrowser.ipdl
@@ -330,14 +330,6 @@ parent:
 
     sync IsParentWindowMainWidgetVisible() returns (bool visible);
 
-    /**
-     * Returns the offset of this tab from the top level window
-     * origin in device pixels.
-     *
-     * aPoint offset values in device pixels.
-     */
-    prio(high) sync GetTabOffset() returns (LayoutDeviceIntPoint aPoint);
-
     /**
      * Gets the DPI of the screen corresponding to this browser.
      */
diff --git a/dom/ipc/TabParent.cpp b/dom/ipc/TabParent.cpp
index 8f423c54b1de..d1132e9b1e17 100644
--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -2266,13 +2266,6 @@ TabParent::RecvEnableDisableCommands(const nsString& aAction,
   return true;
 }
 
-bool
-TabParent::RecvGetTabOffset(LayoutDeviceIntPoint* aPoint)
-{
-  *aPoint = GetChildProcessOffset();
-  return true;
-}
-
 NS_IMETHODIMP
 TabParent::GetChildProcessOffset(int32_t* aOutCssX, int32_t* aOutCssY)
 {
diff --git a/dom/ipc/TabParent.h b/dom/ipc/TabParent.h
index 80d67b5269e1..6ef8ca79b481 100644
--- a/dom/ipc/TabParent.h
+++ b/dom/ipc/TabParent.h
@@ -219,7 +219,6 @@ public:
     virtual bool RecvIsParentWindowMainWidgetVisible(bool* aIsVisible) override;
     virtual bool RecvShowTooltip(const uint32_t& aX, const uint32_t& aY, const nsString& aTooltip) override;
     virtual bool RecvHideTooltip() override;
-    virtual bool RecvGetTabOffset(LayoutDeviceIntPoint* aPoint) override;
     virtual bool RecvGetDPI(float* aValue) override;
     virtual bool RecvGetDefaultScale(double* aValue) override;
     virtual bool RecvGetMaxTouchPoints(uint32_t* aTouchPoints) override;
diff --git a/layout/generic/nsPluginFrame.cpp b/layout/generic/nsPluginFrame.cpp
index 97a713d9f2ae..81f248f893fb 100644
--- a/layout/generic/nsPluginFrame.cpp
+++ b/layout/generic/nsPluginFrame.cpp
@@ -776,9 +776,7 @@ nsPluginFrame::GetRemoteTabChromeOffset()
       if (topWindow) {
         dom::TabChild* tc = dom::TabChild::GetFrom(topWindow);
         if (tc) {
-          LayoutDeviceIntPoint chromeOffset;
-          tc->SendGetTabOffset(&chromeOffset);
-          offset -= chromeOffset;
+          offset += tc->GetChromeDisplacement();
         }
       }
     }