Removed "compositor" child window that was created by the GPU process.

gpu/command_buffer/service/gpu_scheduler.h

Index: gpu/command_buffer/service/gpu_scheduler.h
===================================================================
--- gpu/command_buffer/service/gpu_scheduler.h	(revision 83213)
+++ gpu/command_buffer/service/gpu_scheduler.h	(working copy)
@@ -63,8 +63,11 @@
 
   virtual void ProcessCommands();
 
-  // Helper which causes a call to ProcessCommands to be scheduled later.
-  void ScheduleProcessCommands();
+  // Sets whether commands should be processed by this scheduler. Setting to
+  // false unschedules. Setting to true reschedules. Whether or not the
+  // scheduler is currently scheduled is "reference counted". Every call with
+  // false must eventually be paired by a call with true.
+  void SetScheduled(bool is_scheduled);
 
   // Implementation of CommandBufferEngine.
   virtual Buffer GetSharedMemoryBuffer(int32 shm_id);
@@ -137,6 +140,9 @@
 
 
  private:
+  // Helper which causes a call to ProcessCommands to be scheduled later.
+  void ScheduleProcessCommands();
+
   // Called via a callback just before we are supposed to call the
   // user's swap buffers callback.
   virtual void WillSwapBuffers();
@@ -151,6 +157,9 @@
   scoped_ptr<gles2::GLES2Decoder> decoder_;
   scoped_ptr<CommandParser> parser_;
 
+  // Greater than zero if this is waiting to be rescheduled before continuing.
+  int unscheduled_count_;
+
 #if defined(OS_MACOSX)
   scoped_ptr<AcceleratedSurface> surface_;
   uint64 swap_buffers_count_;