Add a message pump for touchui=1

base/message_pump_glib.h

Index: base/message_pump_glib.h
diff --git a/base/message_pump_glib.h b/base/message_pump_glib.h
index f6d022a25f8b1bc8f0d6044e7cdfd6d07c80f5d2..31d37c023fdc15076e3253f975681f5de9ee7f2a 100644
--- a/base/message_pump_glib.h
+++ b/base/message_pump_glib.h
@@ -57,6 +57,11 @@ class MessagePumpForUI : public MessagePump {
   // Like MessagePump::Run, but GdkEvent objects are routed through dispatcher.
   virtual void RunWithDispatcher(Delegate* delegate, Dispatcher* dispatcher);
 
+  // Run a single iteration of the mainloop. A return value of true indicates
+  // that an event was handled. |block| indicates if it should wait if no event
+  // is ready for processing.
+  virtual bool RunOnce(GMainContext* context, bool block);
+
   virtual void Run(Delegate* delegate) { RunWithDispatcher(delegate, NULL); }
   virtual void Quit();
   virtual void ScheduleWork();
@@ -79,6 +84,10 @@ class MessagePumpForUI : public MessagePump {
   // receiving a notification callback.
   void RemoveObserver(Observer* observer);
 
+  // Dispatch an available GdkEvent. Essentially this allows a subclass to do
+  // some task before/after calling the default handler (EventDispatcher).
+  virtual void DispatchEvents(GdkEvent* event);
+
  private:
   // We may make recursive calls to Run, so we save state that needs to be
   // separate between them in this structure type.