Refactor MessagePumpX to dispatch events inside of the source Dispatch function.

base/message_pump_x.h

Index: base/message_pump_x.h
diff --git a/base/message_pump_x.h b/base/message_pump_x.h
index e6bb71c1d99118828a94e3e93226a904fc897507..62597a28b25dc2ee1325f73d3c2e99adf3468eca 100644
--- a/base/message_pump_x.h
+++ b/base/message_pump_x.h
@@ -45,9 +45,6 @@ class BASE_EXPORT MessagePumpX : public MessagePumpGlib {
   MessagePumpX();
   virtual ~MessagePumpX();
 
-  // Overridden from MessagePumpGlib:
-  virtual bool RunOnce(GMainContext* context, bool block) OVERRIDE;
-
   // Returns default X Display.
   static Display* GetDefaultXDisplay();
 
@@ -57,6 +54,10 @@ class BASE_EXPORT MessagePumpX : public MessagePumpGlib {
   // Sets the default dispatcher to process native events.
   static void SetDefaultDispatcher(MessagePumpDispatcher* dispatcher);
 
+  // Internal function. Called by the glib source dispatch function. Processes
+  // all available X events.
+  gboolean DispatchXEvents();
+
  private:
   // Initializes the glib event source for X.
   void InitXSource();