Remove premultipliedAlpha from WebGraphicsContext3D::Attributes.

third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h

 /*
  * Copyright (c) 2010, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 58 matching lines @@
 // Manages a rendering target (framebuffer + attachment) for a canvas.  Can publish its rendering
 // results to a WebLayer for compositing.
 class PLATFORM_EXPORT DrawingBuffer : public RefCounted<DrawingBuffer>, public WebExternalTextureLayerClient  {
     WTF_MAKE_NONCOPYABLE(DrawingBuffer);
 public:
     enum PreserveDrawingBuffer {
         Preserve,
         Discard
     };
 
-    static PassRefPtr<DrawingBuffer> create(PassOwnPtr<WebGraphicsContext3DProvider>, const IntSize&, PreserveDrawingBuffer, WebGraphicsContext3D::Attributes requestedAttributes);
+    static PassRefPtr<DrawingBuffer> create(PassOwnPtr<WebGraphicsContext3DProvider>, const IntSize&, bool premultipliedAlpha, PreserveDrawingBuffer, WebGraphicsContext3D::Attributes requestedAttributes);
     static void forceNextDrawingBufferCreationToFail();
 
     ~DrawingBuffer() override;
 
     // Destruction will be completed after all mailboxes are released.
     void beginDestruction();
 
     // Issues a glClear() on all framebuffers associated with this DrawingBuffer. The caller is responsible for
     // making the context current and setting the clear values and masks. Modifies the framebuffer binding.
     void clearFramebuffers(GLbitfield clearMask);
@@ skipping 88 matching lines @@
     void restoreFramebufferBindings();
 
     void addNewMailboxCallback(PassOwnPtr<SameThreadClosure> closure) { m_newMailboxCallback = std::move(closure); }
 
 protected: // For unittests
     DrawingBuffer(
         PassOwnPtr<WebGraphicsContext3DProvider>,
         PassOwnPtr<Extensions3DUtil>,
         bool multisampleExtensionSupported,
         bool discardFramebufferSupported,
+        bool premultipliedAlpha,
         PreserveDrawingBuffer,
         WebGraphicsContext3D::Attributes requestedAttributes);
 
     bool initialize(const IntSize&);
 
 private:
     struct TextureParameters {
         DISALLOW_NEW();
         GLenum target;
         GLenum internalColorFormat;
@@ skipping 108 matching lines @@
     GLenum m_activeTextureUnit;
 
     OwnPtr<WebGraphicsContext3DProvider> m_contextProvider;
     WebGraphicsContext3D* m_context; // Lifetime is tied to the m_contextProvider.
     gpu::gles2::GLES2Interface* m_gl; // Lifetime is tied to the m_contextProvider.
     OwnPtr<Extensions3DUtil> m_extensionsUtil;
     IntSize m_size;
     WebGraphicsContext3D::Attributes m_requestedAttributes;
     bool m_multisampleExtensionSupported;
     bool m_discardFramebufferSupported;
+    bool m_premultipliedAlpha;
     GLuint m_fbo;
     // DrawingBuffer's output is double-buffered. m_colorBuffer is the back buffer.
     TextureInfo m_colorBuffer;
     struct FrontBufferInfo {
         TextureInfo texInfo;
         WebExternalTextureMailbox mailbox;
     };
     FrontBufferInfo m_frontColorBuffer;
 
     OwnPtr<SameThreadClosure> m_newMailboxCallback;
@@ skipping 43 matching lines @@
     // used to resize the Canvas.
     SkBitmap m_resizingBitmap;
 
     // Used to flip a bitmap vertically.
     Vector<uint8_t> m_scanline;
 };
 
 } // namespace blink
 
 #endif // DrawingBuffer_h