Revamp OffscreenCanvas commit flow

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"
@@ skipping 56 matching lines @@
   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 sinkId,
-                    uint32_t localId,
-                    uint64_t nonceHigh,
-                    uint64_t nonceLow) {
+  void setFrameSinkId(uint32_t clientId, uint32_t sinkId) {
     m_clientId = clientId;
     m_sinkId = sinkId;
-    m_localId = localId;
-    m_nonceHigh = nonceHigh;
-    m_nonceLow = nonceLow;
   }
   uint32_t clientId() const { return m_clientId; }
   uint32_t sinkId() const { return m_sinkId; }
-  uint32_t localId() const { return m_localId; }
-  uint64_t nonceHigh() const { return m_nonceHigh; }
-  uint64_t nonceLow() const { return m_nonceLow; }
 
   void setExecutionContext(ExecutionContext* context) {
     m_executionContext = context;
   }
 
   // EventTarget implementation
   const AtomicString& interfaceName() const final {
     return EventTargetNames::OffscreenCanvas;
   }
   ExecutionContext* getExecutionContext() const {
@@ skipping 36 matching lines @@
 
   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
+  // cc::FrameSinkId is broken into two 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_sinkId = 0;
-  uint32_t m_localId = 0;
-  uint64_t m_nonceHigh = 0;
-  uint64_t m_nonceLow = 0;
 };
 
 }  // namespace blink
 
 #endif  // OffscreenCanvas_h