Eliminate deferral overhead with canvas to canvas draws

Source/platform/graphics/gpu/AcceleratedImageBufferSurface.h

Index: Source/platform/graphics/gpu/AcceleratedImageBufferSurface.h
diff --git a/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.h b/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.h
index 1b67856c7a349602d4e6d6863474097c56205e04..49462001ca24a7152747d9d863d3d2dfb6823454 100644
--- a/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.h
+++ b/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.h
@@ -44,7 +44,7 @@ public:
     AcceleratedImageBufferSurface(const IntSize&, OpacityMode = NonOpaque);
     ~AcceleratedImageBufferSurface() override { }
 
-    SkCanvas* immediateCanvas() override { return m_surface ? m_surface->getCanvas() : nullptr; }
+    SkCanvas* canvas() override { return m_surface ? m_surface->getCanvas() : nullptr; }
     bool isValid() const override { return m_surface; }
     bool isAccelerated() const override { return true; }
     PassRefPtr<SkImage> newImageSnapshot() override;