Bug 863970. Remove some dead code in imagelib. r=seth

image/decoders/nsGIFDecoder2.cpp

@@ -154,10 +154,6 @@ void nsGIFDecoder2::BeginGIF()
   mGIFOpen = true;
 
   PostSize(mGIFStruct.screen_width, mGIFStruct.screen_height);
-
-  // If we're doing a size decode, we have what we came for
-  if (IsSizeDecode())
-    return;
 }
 
 //******************************************************************************

image/src/RasterImage.cpp

@@ -843,12 +843,6 @@ RasterImage::GetCurrentImgFrame()
   return GetImgFrame(GetCurrentImgFrameIndex());
 }
 
-imgFrame*
-RasterImage::GetCurrentDrawableImgFrame()
-{
-  return GetDrawableImgFrame(GetCurrentImgFrameIndex());
-}
-
 //******************************************************************************
 /* [notxpcom] boolean frameIsOpaque(in uint32_t aWhichFrame); */
 NS_IMETHODIMP_(bool)

image/src/RasterImage.h

@@ -623,7 +623,6 @@ private:
   imgFrame* GetImgFrame(uint32_t framenum);
   imgFrame* GetDrawableImgFrame(uint32_t framenum);
   imgFrame* GetCurrentImgFrame();
-  imgFrame* GetCurrentDrawableImgFrame();
   uint32_t GetCurrentImgFrameIndex() const;
   mozilla::TimeStamp GetCurrentImgFrameEndTime() const;