Add non-blocking frame rate limiting logic to display list 2D canvas

Source/platform/graphics/Canvas2DLayerManagerTest.cpp

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 219 matching lines @@
         EXPECT_EQ(2, layer->m_freeMemoryIfPossibleCount); // Two tries, one before flush, one after flush
         EXPECT_EQ((size_t)5, layer->m_freeableBytes);
         EXPECT_EQ(1, layer->m_flushCount); // flush was attempted
         EXPECT_EQ((size_t)5, layer->bytesAllocated());
         EXPECT_TRUE(manager.isInList(layer.get()));
     }
 
     void doDeferredFrameTestTask(FakeCanvas2DLayerBridge* layer, bool skipCommands)
     {
         EXPECT_FALSE(Canvas2DLayerManager::get().m_taskObserverActive);
-        layer->willUse();
+        layer->didDraw();
         layer->storageAllocatedForRecordingChanged(1);
         EXPECT_TRUE(Canvas2DLayerManager::get().m_taskObserverActive);
         if (skipCommands) {
-            layer->willUse();
+            layer->didDraw();
             layer->skippedPendingDrawCommands();
         }
         blink::Platform::current()->currentThread()->exitRunLoop();
     }
 
     class DeferredFrameTestTask : public blink::WebThread::Task {
     public:
         DeferredFrameTestTask(Canvas2DLayerManagerTest* test, FakeCanvas2DLayerBridge* layer, bool skipCommands)
         {
             m_test = test;
@@ skipping 76 matching lines @@
     hiddenCanvasTest();
 }
 
 TEST_F(Canvas2DLayerManagerTest, testAddRemoveLayer)
 {
     addRemoveLayerTest();
 }
 
 } // unnamed namespace