Make OffscreenCanvas commit() propagate the origin-clean flag.

third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp

 // Copyright 2016 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.
 
 #include "modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h"
 
 #include "bindings/modules/v8/OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/frame/Settings.h"
 #include "core/workers/WorkerGlobalScope.h"
@@ skipping 42 matching lines @@
     // If an OffscreenCanvas has no associated canvas Id, it indicates that
     // it is not an OffscreenCanvas created by transfering control from html
     // canvas.
     exceptionState.throwDOMException(InvalidStateError,
                                      "Commit() was called on a context whose "
                                      "OffscreenCanvas is not associated with a "
                                      "canvas element.");
     return;
   }
   double commitStartTime = WTF::monotonicallyIncreasingTime();
-  RefPtr<StaticBitmapImage> image = this->transferToStaticBitmapImage();
+  RefPtr<StaticBitmapImage> image = transferToStaticBitmapImage();
   getOffscreenCanvas()->getOrCreateFrameDispatcher()->dispatchFrame(
       std::move(image), commitStartTime);
 }
 
 // BaseRenderingContext2D implementation
 bool OffscreenCanvasRenderingContext2D::originClean() const {
   return getOffscreenCanvas()->originClean();
 }
 
 void OffscreenCanvasRenderingContext2D::setOriginTainted() {
@@ skipping 172 matching lines @@
 }
 
 bool OffscreenCanvasRenderingContext2D::isContextLost() const {
   return false;
 }
 
 bool OffscreenCanvasRenderingContext2D::isPaintable() const {
   return this->imageBuffer();
 }
 }