Add an alternate paintContents method to WebContentLayerClient.

public/platform/WebContentLayerClient.h

Index: public/platform/WebContentLayerClient.h
diff --git a/public/platform/WebContentLayerClient.h b/public/platform/WebContentLayerClient.h
index 9aef8b8167f900bf2bd376f0cc10505236123bc6..94497c91754edb22b113f45f70a7083ce8b9b1b5 100644
--- a/public/platform/WebContentLayerClient.h
+++ b/public/platform/WebContentLayerClient.h
@@ -48,6 +48,8 @@ public:
     // The |disableContext| enum controls most processing in
     // GraphicsContext to isolate the painting code in performance tests.
     virtual void paintContents(WebCanvas*, const WebRect& clip, bool canPaintLCDText, WebFloatRect& opaque, GraphicsContextStatus = GraphicsContextEnabled) = 0;
+    // FIXME: Replace the above method with this one.
+    virtual void paintContents(WebCanvas*, const WebRect& clip, bool canPaintLCDText, GraphicsContextStatus = GraphicsContextEnabled) = 0;
 
 protected:
     virtual ~WebContentLayerClient() { }