Reland Submit Compositor Frame from OffscreenCanvas on main

third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef OffscreenCanvas_h
 #define OffscreenCanvas_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/canvas/CanvasImageSource.h"
 #include "platform/geometry/IntSize.h"
+#include "platform/graphics/OffscreenCanvasFrameDispatcher.h"
 #include "platform/heap/Handle.h"
 #include <memory>
 
 namespace blink {
 
 class CanvasContextCreationAttributes;
 class ImageBitmap;
 class OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext;
 typedef OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext OffscreenRenderingContext;
 
@@ skipping 19 matching lines @@
     CanvasRenderingContext* getCanvasRenderingContext(ScriptState*, const String&, const CanvasContextCreationAttributes&);
     CanvasRenderingContext* renderingContext() { return m_context; }
 
     static void registerRenderingContextFactory(std::unique_ptr<CanvasRenderingContextFactory>);
 
     bool originClean() const;
     void setOriginTainted() { m_originClean = false; }
     // TODO(crbug.com/630356): apply the flag to WebGL context as well
     void setDisableReadingFromCanvasTrue() { m_disableReadingFromCanvas = true; }
 
+    OffscreenCanvasFrameDispatcher* getOrCreateFrameDispatcher();
+
     void setSurfaceId(uint32_t clientId, uint32_t localId, uint64_t nonce)
     {
         m_clientId = clientId;
         m_localId = localId;
         m_nonce = nonce;
     }
     uint32_t clientId() const { return m_clientId; }
     uint32_t localId() const { return m_localId; }
     uint64_t nonce() const { return m_nonce; }
 
@@ skipping 18 matching lines @@
     Member<CanvasRenderingContext> m_context;
     int m_canvasId = -1; // DOMNodeIds starts from 0, using -1 to indicate no associated canvas element.
     IntSize m_size;
     bool m_isNeutered = false;
 
     bool m_originClean;
     bool m_disableReadingFromCanvas = false;
 
     bool isPaintable() const;
 
+    std::unique_ptr<OffscreenCanvasFrameDispatcher> m_frameDispatcher;
     // cc::SurfaceId is broken into three integer components as this can be used
     // in transfer of OffscreenCanvas across threads
     // If this object is not created via HTMLCanvasElement.transferControlToOffscreen(),
     // then the following members would remain as initialized zero values.
     uint32_t m_clientId = 0;
     uint32_t m_localId = 0;
     uint64_t m_nonce = 0;
 };
 
 } // namespace blink
 
 #endif // OffscreenCanvas_h