Bug 972843 - Make Image::GetAsSourceSurface pure virtual. r=nical

gfx/layers/ImageContainer.cpp

@@ -48,13 +48,6 @@ namespace layers {
 
 Atomic<int32_t> Image::sSerialCounter(0);
 
-TemporaryRef<gfx::SourceSurface>
-Image::GetAsSourceSurface()
-{
-  nsRefPtr<gfxASurface> surface = DeprecatedGetAsSurface();
-  return gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(nullptr, surface);
-}
-
 already_AddRefed<Image>
 ImageFactory::CreateImage(ImageFormat aFormat,
                           const gfx::IntSize &,

gfx/layers/ImageContainer.h

@@ -213,7 +213,7 @@ public:
   void MarkSent() { mSent = true; }
   bool IsSentToCompositor() { return mSent; }
 
-  virtual TemporaryRef<gfx::SourceSurface> GetAsSourceSurface();
+  virtual TemporaryRef<gfx::SourceSurface> GetAsSourceSurface() = 0;
 
 protected:
   Image(void* aImplData, ImageFormat aFormat) :