one more step towards multiple display support

- remove dependency on cached state in validateVisibility
- get rid of mVertices and mTransformedBounds
- get rid of validateVisibility
- get rid of unlockPageFlip
- handleTransaction now returns a dirty region
- computevisibileregion now uses window-manager space
diff --git a/services/surfaceflinger/MessageQueue.h b/services/surfaceflinger/MessageQueue.h
index ea29e7e..710b2c2 100644
--- a/services/surfaceflinger/MessageQueue.h
+++ b/services/surfaceflinger/MessageQueue.h
@@ -70,8 +70,8 @@
     public:
         Handler(MessageQueue& queue) : mQueue(queue), mEventMask(0) { }
         virtual void handleMessage(const Message& message);
-        void signalRefresh();
-        void signalInvalidate();
+        void dispatchRefresh();
+        void dispatchInvalidate();
     };
 
     friend class Handler;