Enable sync allocation of GpuMemoryBuffers from the browser process.

content/common/gpu/client/gpu_memory_buffer_impl.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 CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/size.h"
 
 namespace content {
 
 // Provides common implementation of a GPU memory buffer.
 class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
  public:
   typedef base::Callback<void(const gfx::GpuMemoryBufferHandle& handle)>
       AllocationCallback;
+  typedef base::Callback<void(scoped_ptr<GpuMemoryBufferImpl> buffer)>
+      CreationCallback;

[reveman, 2014/09/09 17:18:26]

nit: sort these typedefs in the order they are used below. Creation before
Allocation.

[alexst (slow to review), 2014/09/09 21:53:57]

Done.

 
   virtual ~GpuMemoryBufferImpl();
 
   // Creates a GPU memory buffer instance with |size| and |internalformat| for
   // |usage|.
-  static scoped_ptr<GpuMemoryBufferImpl> Create(const gfx::Size& size,
-                                                unsigned internalformat,
-                                                unsigned usage);
+  static void Create(const gfx::Size& size,
+                     unsigned internalformat,
+                     unsigned usage,
+                     const CreationCallback& callback);
 
   // Allocates a GPU memory buffer with |size| and |internalformat| for |usage|
   // by |child_process| identified by |child_id|. The |handle| returned can be
   // used by the |child_process| to create an instance of this class.
   static void AllocateForChildProcess(const gfx::Size& size,
                                       unsigned internalformat,
                                       unsigned usage,
                                       base::ProcessHandle child_process,
                                       int child_id,
                                       const AllocationCallback& callback);
@@ skipping 29 matching lines @@
   const gfx::Size size_;
   const unsigned internalformat_;
   bool mapped_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_H_