Accelerate small canvases if Ganesh is on.

public/platform/WebLayerTreeView.h

Index: public/platform/WebLayerTreeView.h
diff --git a/public/platform/WebLayerTreeView.h b/public/platform/WebLayerTreeView.h
index 134201641833257cbdaed29ace3b3bf55091f46e..43549b492355b9c7beb61ff3df1b4bbd4d9d7fa7 100644
--- a/public/platform/WebLayerTreeView.h
+++ b/public/platform/WebLayerTreeView.h
@@ -141,6 +141,9 @@ public:
 
     // Toggles scroll bottleneck rects on the HUD layer
     virtual void setShowScrollBottleneckRects(bool) { }
+
+    // FIXME: make pure virtual once the cc-side patch is in
+    virtual bool usesGpuRasterization() { return false; };
 };
 
 } // namespace blink