High CPU and increased memory usage fix for high-res (GIF, WEBP...) animations.

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

Index: third_party/WebKit/Source/platform/graphics/DeferredImageDecoder.h
diff --git a/third_party/WebKit/Source/platform/graphics/DeferredImageDecoder.h b/third_party/WebKit/Source/platform/graphics/DeferredImageDecoder.h
index d6084c91d47c542ff2caad1b7e16f2d693c3c3c3..36f81799e3e88c393e19f911923c1375b1a4b6e6 100644
--- a/third_party/WebKit/Source/platform/graphics/DeferredImageDecoder.h
+++ b/third_party/WebKit/Source/platform/graphics/DeferredImageDecoder.h
@@ -43,7 +43,7 @@ namespace blink {
 
 class ImageFrameGenerator;
 class SharedBuffer;
-struct FrameData;
+struct DeferredFrameData;
 
 class PLATFORM_EXPORT DeferredImageDecoder final {
     WTF_MAKE_NONCOPYABLE(DeferredImageDecoder);
@@ -87,7 +87,7 @@ private:
     void activateLazyDecoding();
     void prepareLazyDecodedFrames();
 
-    PassRefPtr<SkImage> createFrameImageAtIndex(size_t index, bool knownToBeOpaque) const;
+    PassRefPtr<SkImage> createFrameImageAtIndex(size_t index, bool knownToBeOpaque);
 
     // Copy of the data that is passed in, used by deferred decoding.
     // Allows creating readonly snapshots that may be read in another thread.
@@ -101,8 +101,8 @@ private:
     bool m_hasColorProfile;
     bool m_canYUVDecode;
 
-    // Carries only frame state and other information. Does not carry bitmap.
-    Vector<FrameData> m_frameData;
+    // Caches frame state information.
+    Vector<DeferredFrameData> m_frameData;
     RefPtr<ImageFrameGenerator> m_frameGenerator;
 
     static bool s_enabled;