Eliminate deferral overhead with canvas to canvas draws

Source/platform/graphics/Canvas2DImageBufferSurface.h

Index: Source/platform/graphics/Canvas2DImageBufferSurface.h
diff --git a/Source/platform/graphics/Canvas2DImageBufferSurface.h b/Source/platform/graphics/Canvas2DImageBufferSurface.h
index e9020268345ba442068a0c42b85622b2b55cd766..454f46cc1e702d164317e69b3a6e19b298e2232d 100644
--- a/Source/platform/graphics/Canvas2DImageBufferSurface.h
+++ b/Source/platform/graphics/Canvas2DImageBufferSurface.h
@@ -58,7 +58,7 @@ public:
     void finalizeFrame(const FloatRect &dirtyRect) override { m_layerBridge->finalizeFrame(dirtyRect); }
     void willOverwriteCanvas() override { m_layerBridge->willOverwriteCanvas(); }
     SkCanvas* canvas() override { return m_layerBridge->canvas(); }
-    SkCanvas* immediateCanvas() override { return m_layerBridge->immediateCanvas(); }
+    void disableDeferral() override { m_layerBridge->disableDeferral(); }
     bool isValid() const override { return m_layerBridge && m_layerBridge->checkSurfaceValid(); }
     bool restore() override { return m_layerBridge->restoreSurface(); }
     WebLayer* layer() const override { return m_layerBridge->layer(); }