Cancel GPU acceleration for 2D canvas when drawing very large images

third_party/WebKit/Source/core/html/HTMLVideoElement.h

Index: third_party/WebKit/Source/core/html/HTMLVideoElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLVideoElement.h b/third_party/WebKit/Source/core/html/HTMLVideoElement.h
index 7b99a2c0d17e171599927e5f6372bcfbe24d3bb8..8bd09cc38e076bf4d54df984839c9708418a8447 100644
--- a/third_party/WebKit/Source/core/html/HTMLVideoElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLVideoElement.h
@@ -87,6 +87,7 @@ public:
     bool isHTMLVideoElement() const override { return true; }
     int sourceWidth() override { return videoWidth(); }
     int sourceHeight() override { return videoHeight(); }
+    bool isAccelerated() const override { return false; } // Video elements currently always go through RAM when used as a canvas image source.
 
     // ImageBitmapSource implementation
     IntSize bitmapSourceSize() const override;