Refactor gpu::Buffer to allow different types of backing

gpu/command_buffer/client/client_test_helper.cc

 // Copyright (c) 2012 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.
 
 // Tests for GLES2Implementation.
 
 #include "gpu/command_buffer/client/client_test_helper.h"
 
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/client/cmd_buffer_helper.h"
@@ skipping 57 matching lines @@
 }
 
 scoped_refptr<gpu::Buffer> MockCommandBufferBase::CreateTransferBuffer(
     size_t size,
     int32* id) {
   *id = GetNextFreeTransferBufferId();
   if (*id >= 0) {
     int32 ndx = *id - kTransferBufferBaseId;
     scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory());
     shared_memory->CreateAndMapAnonymous(size);
-    transfer_buffer_buffers_[ndx] = new gpu::Buffer(shared_memory.Pass(), size);
+    transfer_buffer_buffers_[ndx] =
+        MakeBufferFromSharedMemory(shared_memory.Pass(), size);
   }
   return GetTransferBuffer(*id);
 }
 
 void MockCommandBufferBase::DestroyTransferBufferHelper(int32 id) {
   DCHECK_GE(id, kTransferBufferBaseId);
   DCHECK_LT(id, kTransferBufferBaseId + kMaxTransferBuffers);
   id -= kTransferBufferBaseId;
   transfer_buffer_buffers_[id] = NULL;
 }
@@ skipping 63 matching lines @@
 
 MockClientGpuControl::MockClientGpuControl() {
 }
 
 MockClientGpuControl::~MockClientGpuControl() {
 }
 
 }  // namespace gpu