Move Insert/SignalSyncPoint() to GpuControl

gpu/command_buffer/common/gpu_control.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_COMMON_GPU_CONTROL_H_
 #define GPU_COMMAND_BUFFER_COMMON_GPU_CONTROL_H_
 
 #include <vector>
 
+#include "base/callback.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "gpu/command_buffer/common/types.h"
 #include "gpu/gpu_export.h"
 
 namespace gfx {
 class GpuMemoryBuffer;
 }
 
 namespace gpu {
 
@@ skipping 14 matching lines @@
       int32* id) = 0;
 
   // Destroy a gpu memory buffer. The ID must be positive.
   virtual void DestroyGpuMemoryBuffer(int32 id) = 0;
 
   // Generates n unique mailbox names that can be used with
   // GL_texture_mailbox_CHROMIUM.
   virtual bool GenerateMailboxNames(unsigned num,
                                     std::vector<gpu::Mailbox>* names) = 0;
 
+  // Inserts a sync point, returning its ID. Sync point IDs are global and can
+  // be used for cross-context synchronization.
+  virtual uint32 InsertSyncPoint() = 0;
+
+  // Runs |callback| when a sync point is reached.
+  virtual void SignalSyncPoint(uint32 sync_point,
+                               const base::Closure& callback) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(GpuControl);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_GPU_CONTROL_H_