GIF decoding to Index8, unit tests and misusing unit test as benchmark

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 acf7b75658dd96f53aafb5720e1a75db0ecc9826..8784400dad2afe20e7e47550fb6abb7509746642 100644
--- a/third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h
+++ b/third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h
@@ -70,7 +70,7 @@ public:
     // Decodes and scales the specified frame at |index|. The dimensions and output
     // format are given in SkImageInfo. Decoded pixels are written into |pixels| with
     // a stride of |rowBytes|. Returns true if decoding was successful.
-    bool decodeAndScale(const SkImageInfo&, size_t index, void* pixels, size_t rowBytes);
+    bool decodeAndScale(const SkImageInfo&, size_t index, void* pixels, size_t rowBytes, SkPMColor ctable[] = nullptr, int* ctableCount = nullptr);
 
     // Decodes YUV components directly into the provided memory planes.
     bool decodeToYUV(SkISize componentSizes[3], void* planes[3], size_t rowBytes[3]);
@@ -91,6 +91,10 @@ public:
 
     bool getYUVComponentSizes(SkISize componentSizes[3]);
 
+    // Specifies that there is decoder support, to optimize when to call canDecodeTo().
+    void setDecoderCanDecodeToIndex8(bool canIt) { m_decoderCanDecodeToIndex8 = canIt; }
+    bool canDecodeTo(size_t index, SkColorType outputType);
+
 private:
     ImageFrameGenerator(const SkISize& fullSize, PassRefPtr<SharedBuffer>, bool allDataReceived, bool isMultiFrame);
 
@@ -102,11 +106,11 @@ private:
     void setHasAlpha(size_t index, bool hasAlpha);
 
     // These methods are called while m_decodeMutex is locked.
-    SkBitmap tryToResumeDecode(const SkISize& scaledSize, size_t index);
+    SkBitmap tryToResumeDecode(const SkISize& scaledSize, size_t index, SkColorType outputColor);
 
     // Use the given decoder to decode. If a decoder is not given then try to create one.
     // Returns true if decoding was complete.
-    bool decode(size_t index, ImageDecoder**, SkBitmap*);
+    bool decode(size_t index, ImageDecoder**, SkBitmap*, SkColorType);
 
     SkISize m_fullSize;
 
@@ -138,6 +142,7 @@ private:
 #if COMPILER(MSVC)
     friend struct ::WTF::OwnedPtrDeleter<ExternalMemoryAllocator>;
 #endif
+    bool m_decoderCanDecodeToIndex8;
 };
 
 } // namespace blink