gpu: Generate mailboxes on client side

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"
@@ skipping 21 matching lines @@
   // its ID or -1 on error.
   virtual gfx::GpuMemoryBuffer* CreateGpuMemoryBuffer(
       size_t width,
       size_t height,
       unsigned internalformat,
       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;
 
   // Runs |callback| when a query created via glCreateQueryEXT() has cleared
   // passed the glEndQueryEXT() point.
@@ skipping 10 matching lines @@
   // returns a stream identifier.
   virtual uint32 CreateStreamTexture(uint32 texture_id) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GpuControl);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_GPU_CONTROL_H_