Revert 258122 "gpu: Allow fences to check whether a flush has oc..."

trunk/src/ui/gl/gl_context.h

Index: trunk/src/ui/gl/gl_context.h
===================================================================
--- trunk/src/ui/gl/gl_context.h	(revision 258964)
+++ trunk/src/ui/gl/gl_context.h	(working copy)
@@ -6,12 +6,10 @@
 #define UI_GL_GL_CONTEXT_H_
 
 #include <string>
-#include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/synchronization/cancellation_flag.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gl_state_restorer.h"
 #include "ui/gl/gpu_preference.h"
@@ -34,25 +32,6 @@
   virtual bool Initialize(
       GLSurface* compatible_surface, GpuPreference gpu_preference) = 0;
 
-  class FlushEvent : public base::RefCountedThreadSafe<FlushEvent> {
-    public:
-      bool IsSignaled();
-
-    private:
-      friend class base::RefCountedThreadSafe<FlushEvent>;
-      friend class GLContext;
-      FlushEvent();
-      virtual ~FlushEvent();
-      void Signal();
-
-      base::CancellationFlag flag_;
-  };
-
-  // Needs to be called with this context current. It will return a FlushEvent
-  // that is initially unsignaled, but will transition to signaled after the
-  // next glFlush() or glFinish() occurs in this context.
-  scoped_refptr<FlushEvent> SignalFlush();
-
   // Destroys the GL context.
   virtual void Destroy() = 0;
 
@@ -135,9 +114,6 @@
   // Returns the GL renderer string. The context must be current.
   virtual std::string GetGLRenderer();
 
-  // Called when glFlush()/glFinish() is called with this context current.
-  void OnFlush();
-
  protected:
   virtual ~GLContext();
 
@@ -164,8 +140,6 @@
   scoped_ptr<GLStateRestorer> state_restorer_;
   scoped_ptr<GLVersionInfo> version_info_;
 
-  std::vector<scoped_refptr<FlushEvent> > flush_events_;
-
   DISALLOW_COPY_AND_ASSIGN(GLContext);
 };