Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/service/gpu_service_test.h

Index: gpu/command_buffer/service/gpu_service_test.h
diff --git a/gpu/command_buffer/service/gpu_service_test.h b/gpu/command_buffer/service/gpu_service_test.h
index 189031c581b851f7407158348f19dd6b9afe4d62..539d6ba7f3fefa811401a35f09f020041ab80ad4 100644
--- a/gpu/command_buffer/service/gpu_service_test.h
+++ b/gpu/command_buffer/service/gpu_service_test.h
@@ -22,12 +22,12 @@ namespace gles2 {
 class GpuServiceTest : public testing::Test {
  public:
   GpuServiceTest();
-  virtual ~GpuServiceTest();
+  ~GpuServiceTest() override;
 
  protected:
   void SetUpWithGLVersion(const char* gl_version, const char* gl_extensions);
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
   scoped_ptr< ::testing::StrictMock< ::gfx::MockGLInterface> > gl_;