Revert of Make OffscreenCanvas Transferable

third_party/WebKit/Source/modules/canvas/HTMLCanvasElementModuleTest.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/canvas/HTMLCanvasElementModule.h"
 
-#include "core/dom/DOMNodeIds.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLDocument.h"
 #include "core/loader/EmptyClients.h"
 #include "core/testing/DummyPageHolder.h"
 #include "modules/offscreencanvas/OffscreenCanvas.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
@@ skipping 12 matching lines @@
 
     HTMLCanvasElement& canvasElement() const { return *m_canvasElement; }
 private:
     Persistent<HTMLCanvasElement> m_canvasElement;
 };
 
 TEST_F(HTMLCanvasElementModuleTest, TransferControlToOffscreen)
 {
     NonThrowableExceptionState exceptionState;
     OffscreenCanvas* offscreenCanvas = HTMLCanvasElementModule::transferControlToOffscreen(canvasElement(), exceptionState);
-    int canvasId = offscreenCanvas->getAssociatedCanvasId();
-    EXPECT_EQ(canvasId, DOMNodeIds::idForNode(&(canvasElement())));
+    HTMLCanvasElement* canvas = offscreenCanvas->getAssociatedCanvas();
+    EXPECT_EQ(canvas, canvasElement());
 }
 
 } // namespace blink