cc: Remove the software compositing bool from PrepareTextureMailbox

third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 73 matching lines @@
         EnableAcceleration,
         ForceAccelerationForTesting,
     };
 
     Canvas2DLayerBridge(std::unique_ptr<WebGraphicsContext3DProvider>, const IntSize&, int msaaSampleCount, OpacityMode, AccelerationMode);
     ~Canvas2DLayerBridge() override;
 
     // cc::TextureLayerClient implementation.
     bool PrepareTextureMailbox(
         cc::TextureMailbox* outMailbox,
-        std::unique_ptr<cc::SingleReleaseCallback>* outReleaseCallback,
-        bool useSharedMemory) override;
+        std::unique_ptr<cc::SingleReleaseCallback>* outReleaseCallback) override;
 
     // Callback for mailboxes given to the compositor from PrepareTextureMailbox.
     void mailboxReleased(const gpu::Mailbox&, const gpu::SyncToken&,
         bool lostResource);
 
     // ImageBufferSurface implementation
     void finalizeFrame(const FloatRect &dirtyRect);
     void willWritePixels();
     void willOverwriteAllPixels();
     void willOverwriteCanvas();
@@ skipping 175 matching lines @@
     // Each element in this vector represents an IOSurface backed texture that
     // is ready to be reused.
     // Elements in this vector can safely be purged in low memory conditions.
     Vector<ImageInfo> m_imageInfoCache;
 #endif // USE_IOSURFACE_FOR_2D_CANVAS
 };
 
 } // namespace blink
 
 #endif