Avoid GPU readback in tex(Sub)Image2D(ImageBitmap)

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

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 59 matching lines @@
     bool isAllDataReceived() const { return m_allDataReceived; }
     bool hasColorProfile() const;
 
     void resetAnimation() override;
     bool maybeAnimated() override;
 
     void setAnimationPolicy(ImageAnimationPolicy policy) override { m_animationPolicy = policy; }
     ImageAnimationPolicy animationPolicy() override { return m_animationPolicy; }
     void advanceTime(double deltaTimeInSeconds) override;
 
-    PassRefPtr<SkImage> imageForCurrentFrame() override;
+    PassRefPtr<SkImage> imageForCurrentFrame(WebGraphicsContext3DProvider* = nullptr) override;
     PassRefPtr<Image> imageForDefaultFrame() override;
 
     bool currentFrameKnownToBeOpaque(MetadataMode = UseCurrentMetadata) override;
     bool currentFrameIsComplete() override;
     bool currentFrameIsLazyDecoded() override;
 
     ImageOrientation currentFrameOrientation();
 
     // Construct a BitmapImage with the given orientation.
     static PassRefPtr<BitmapImage> createWithOrientationForTesting(const SkBitmap&, ImageOrientation);
@@ skipping 89 matching lines @@
     mutable bool m_haveSize : 1; // Whether or not our |m_size| member variable has the final overall image size yet.
     bool m_sizeAvailable : 1; // Whether or not we can obtain the size of the first image frame yet from ImageIO.
     mutable bool m_haveFrameCount : 1;
 };
 
 DEFINE_IMAGE_TYPE_CASTS(BitmapImage);
 
 } // namespace blink
 
 #endif