diff --git a/gfx/layers/YCbCrImageDataSerializer.cpp b/gfx/layers/YCbCrImageDataSerializer.cpp
index 74ce60fe97e3..a8978674dfa5 100644
--- a/gfx/layers/YCbCrImageDataSerializer.cpp
+++ b/gfx/layers/YCbCrImageDataSerializer.cpp
@@ -132,13 +132,6 @@ YCbCrImageDataSerializer::ComputeMinBufferSize(const LayerIntSize& aYSize,
          + MOZ_ALIGN_WORD(sizeof(YCbCrBufferInfo));
 }
 
-size_t
-YCbCrImageDataSerializer::ComputeMinBufferSize(const gfxIntSize& aYSize,
-                                               const gfxIntSize& aCbCrSize)
-{
-  return ComputeMinBufferSize(LayerIntSize(aYSize.width, aYSize.height),
-                              LayerIntSize(aCbCrSize.width, aCbCrSize.height));
-}
 // Offset in bytes
 static size_t ComputeOffset(uint32_t aSize)
 {
@@ -171,16 +164,6 @@ YCbCrImageDataSerializer::InitializeBufferInfo(const LayerIntSize& aYSize,
   info->mStereoMode = aStereoMode;
 }
 
-void
-YCbCrImageDataSerializer::InitializeBufferInfo(const gfxIntSize& aYSize,
-                                               const gfxIntSize& aCbCrSize,
-                                               StereoMode aStereoMode)
-{
-  InitializeBufferInfo(LayerIntSize(aYSize.width, aYSize.height),
-                       LayerIntSize(aCbCrSize.width, aCbCrSize.height),
-                       aStereoMode);
-}
-
 static void CopyLineWithSkip(const uint8_t* src, uint8_t* dst, uint32_t len, uint32_t skip) {
   for (uint32_t i = 0; i < len; ++i) {
     *dst = *src;
diff --git a/gfx/layers/YCbCrImageDataSerializer.h b/gfx/layers/YCbCrImageDataSerializer.h
index 7bd33e0a4a79..6c8ab0c35a79 100644
--- a/gfx/layers/YCbCrImageDataSerializer.h
+++ b/gfx/layers/YCbCrImageDataSerializer.h
@@ -106,8 +106,6 @@ public:
    */
   static size_t ComputeMinBufferSize(const LayerIntSize& aYSize,
                                      const LayerIntSize& aCbCrSize);
-  static size_t ComputeMinBufferSize(const gfxIntSize& aYSize,
-                                     const gfxIntSize& aCbCrSize);
   static size_t ComputeMinBufferSize(uint32_t aSize);
 
   /**
@@ -118,9 +116,6 @@ public:
   void InitializeBufferInfo(const LayerIntSize& aYSize,
                             const LayerIntSize& aCbCrSize,
                             StereoMode aStereoMode);
-  void InitializeBufferInfo(const gfxIntSize& aYSize,
-                            const gfxIntSize& aCbCrSize,
-                            StereoMode aStereoMode);
 
   bool CopyData(const uint8_t* aYData,
                 const uint8_t* aCbData, const uint8_t* aCrData,