Use Scoped COM helpers for collecting GPU information

content/gpu/gpu_info_collector_unittest_win.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "base/memory/scoped_ptr.h"
 #include "content/gpu/gpu_idirect3d9_mock_win.h"
 #include "content/gpu/gpu_info_collector.h"
 #include "content/public/common/gpu_info.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 13 matching lines @@
     test_identifier_.DeviceId = 0x429;
     test_identifier_.DriverVersion.QuadPart = 0x6000e000b1e23;  // 6.14.11.7715
     test_caps_.PixelShaderVersion = 0xffff0300;  // 3.0
     test_caps_.VertexShaderVersion = 0xfffe0300;  // 3.0
 
     EXPECT_CALL(d3d_, GetDeviceCaps(_, _, _))
         .WillOnce(DoAll(SetArgumentPointee<2>(test_caps_),
                         Return(D3D_OK)));
     EXPECT_CALL(d3d_, QueryInterface(__uuidof(IDirect3D9Ex), _))
         .WillOnce(Return(E_NOINTERFACE));
-    EXPECT_CALL(d3d_, Release());
   }
   void TearDown() {
   }
 
  public:
   IDirect3D9Mock d3d_;
  private:
   D3DADAPTER_IDENTIFIER9 test_identifier_;
   D3DCAPS9 test_caps_;
 };
 
 TEST_F(GPUInfoTest, PixelShaderVersionD3D) {
   content::GPUInfo gpu_info;
   ASSERT_TRUE(gpu_info_collector::CollectGraphicsInfoD3D(&d3d_, &gpu_info));
   EXPECT_EQ(gpu_info.pixel_shader_version, "3.0");
 }
 
 TEST_F(GPUInfoTest, VertexShaderVersionD3D) {
   content::GPUInfo gpu_info;
   ASSERT_TRUE(gpu_info_collector::CollectGraphicsInfoD3D(&d3d_, &gpu_info));
   EXPECT_EQ(gpu_info.vertex_shader_version, "3.0");
 }