Refactor gpu::Buffer to allow different types of backing

gpu/command_buffer/service/gpu_scheduler_unittest.cc

 // Copyright (c) 2011 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.
 
 #include "base/message_loop/message_loop.h"
 #include "gpu/command_buffer/common/command_buffer_mock.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_mock.h"
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 #include "gpu/command_buffer/service/mocks.h"
@@ skipping 19 matching lines @@
 
 class GpuSchedulerTest : public testing::Test {
  protected:
   static const int32 kTransferBufferId = 123;
 
   virtual void SetUp() {
     scoped_ptr<base::SharedMemory> shared_memory(new ::base::SharedMemory);
     shared_memory->CreateAndMapAnonymous(kRingBufferSize);
     buffer_ = static_cast<int32*>(shared_memory->memory());
     shared_memory_buffer_ =
-        new gpu::Buffer(shared_memory.Pass(), kRingBufferSize);
+        MakeBufferFromSharedMemory(shared_memory.Pass(), kRingBufferSize);
     memset(buffer_, 0, kRingBufferSize);
 
     command_buffer_.reset(new MockCommandBuffer);
 
     CommandBuffer::State default_state;
     default_state.num_entries = kRingBufferEntries;
     ON_CALL(*command_buffer_.get(), GetState())
         .WillByDefault(Return(default_state));
 
     decoder_.reset(new gles2::MockGLES2Decoder());
@@ skipping 157 matching lines @@
 
   EXPECT_EQ(kRingBufferSize, scheduler_->GetSharedMemoryBuffer(7)->size());
 }
 
 TEST_F(GpuSchedulerTest, SetTokenForwardsToCommandBuffer) {
   EXPECT_CALL(*command_buffer_, SetToken(7));
   scheduler_->set_token(7);
 }
 
 }  // namespace gpu