Mark layers that can use LCD text based on layer transform and opacity.

cc/content_layer.h

Index: cc/content_layer.h
diff --git a/cc/content_layer.h b/cc/content_layer.h
index 5505d85ffd33cc832798a5a8630584abb1a854de..eaeaa54b55865440905d5bdff671c52bf32d3395 100644
--- a/cc/content_layer.h
+++ b/cc/content_layer.h
@@ -49,12 +49,16 @@ protected:
     explicit ContentLayer(ContentLayerClient*);
     virtual ~ContentLayer();
 
+    virtual bool canUseLCDTextWillChange() OVERRIDE;
+    virtual void canUseLCDTextDidChange() OVERRIDE;
+
 private:
     virtual LayerUpdater* updater() const OVERRIDE;
     virtual void createUpdaterIfNeeded() OVERRIDE;
 
     ContentLayerClient* m_client;
     scoped_refptr<LayerUpdater> m_updater;
+    int m_lcdTextChangeCount;
 };
 
 }