Remove full-size bitmap copy on SkImage::scalePixels->IFG::decodeAndScale

third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h

Index: third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h
diff --git a/third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h b/third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h
index 65ce816863b5a8a378fc0cbc7f67b3c2607e2d2d..6d06ef5c2c7d42066309bdc2bd859a34faacd3f5 100644
--- a/third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h
+++ b/third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h
@@ -73,8 +73,9 @@ class PLATFORM_EXPORT ImageFrameGenerator final
 
   ~ImageFrameGenerator();
 
-  // Decodes and scales the specified frame at |index|. The dimensions and
-  // output format are given in SkImageInfo. Decoded pixels are written into
+  // Decodes and scales the specified frame at |index|.  The dimensions and
+  // output format are given in SkImageInfo.  Decoded pixels are scaled if
+  // necessary, applying the specified filter-quality, and then written into
   // |pixels| with a stride of |rowBytes|. Returns true if decoding was
   // successful.
   bool decodeAndScale(SegmentReader*,
@@ -82,7 +83,8 @@ class PLATFORM_EXPORT ImageFrameGenerator final
                       size_t index,
                       const SkImageInfo&,
                       void* pixels,
-                      size_t rowBytes);
+                      size_t rowBytes,
+                      SkFilterQuality = kLow_SkFilterQuality);
 
   // Decodes YUV components directly into the provided memory planes. Must not
   // be called unless getYUVComponentSizes has been called and returned true.