DeferredImageDecoder: early-out onGetYUV8Planes when possible

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

Index: third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.h
diff --git a/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.h b/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.h
index 9a9ac40b4cbe9e356c656b1bc2edaf935b9225fb..eb2c2da3be34bbd27b2ca211e3a84fe7d8b8812f 100644
--- a/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.h
+++ b/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.h
@@ -46,12 +46,13 @@ class PLATFORM_EXPORT DecodingImageGenerator final : public SkImageGenerator {
     USING_FAST_MALLOC(DecodingImageGenerator);
     WTF_MAKE_NONCOPYABLE(DecodingImageGenerator);
 public:
-    static SkImageGenerator* create(SkData*);
-
     DecodingImageGenerator(PassRefPtr<ImageFrameGenerator>, const SkImageInfo&, size_t index);
     ~DecodingImageGenerator() override;
 
     void setGenerationId(size_t id) { m_generationId = id; }
+    void setCanYUVDecode(bool yes) { m_canYUVDecode = yes; }
+
+    static SkImageGenerator* create(SkData*); // Highly unsual access.
 
 protected:
     SkData* onRefEncodedData() override;
@@ -64,6 +65,7 @@ private:
     RefPtr<ImageFrameGenerator> m_frameGenerator;
     size_t m_frameIndex;
     size_t m_generationId;
+    bool m_canYUVDecode;
 };
 
 } // namespace blink