toggle FPS counter in compositor

cc/heads_up_display_layer.h

Index: cc/heads_up_display_layer.h
diff --git a/cc/heads_up_display_layer.h b/cc/heads_up_display_layer.h
index 9d087c0e4bec8ceea415b850e6b4e18080fcb1ad..09cc4a2116a8e4f4acf00a3b8540710dc48f1b56 100644
--- a/cc/heads_up_display_layer.h
+++ b/cc/heads_up_display_layer.h
@@ -19,7 +19,9 @@ public:
     virtual void update(CCTextureUpdateQueue&, const CCOcclusionTracker*, CCRenderingStats&) OVERRIDE;
     virtual bool drawsContent() const OVERRIDE;
 
+    bool hasFontAtlas() const;
     void setFontAtlas(scoped_ptr<CCFontAtlas>);
+    void setShowFPSCounter(bool);
 
     virtual scoped_ptr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
     virtual void pushPropertiesTo(CCLayerImpl*) OVERRIDE;
@@ -31,6 +33,8 @@ private:
     virtual ~HeadsUpDisplayLayerChromium();
 
     scoped_ptr<CCFontAtlas> m_fontAtlas;
+    bool m_showFPSCounter;
+    bool m_hasFontAtlas;
 };
 
 }  // namespace cc