Standardize usage of virtual/override/final specifiers.

content/browser/gpu/gpu_data_manager_impl_private_unittest.cc

Index: content/browser/gpu/gpu_data_manager_impl_private_unittest.cc
diff --git a/content/browser/gpu/gpu_data_manager_impl_private_unittest.cc b/content/browser/gpu/gpu_data_manager_impl_private_unittest.cc
index 00963fe3eb9f04920a9eaca420f9c66a15ddad60..8bcb01052e723fd1d3b61c2813a552840af2ad10 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private_unittest.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private_unittest.cc
@@ -71,7 +71,7 @@ class GpuDataManagerImplPrivateTest : public testing::Test {
  public:
   GpuDataManagerImplPrivateTest() { }
 
-  virtual ~GpuDataManagerImplPrivateTest() { }
+  ~GpuDataManagerImplPrivateTest() override {}
 
  protected:
   // scoped_ptr doesn't work with GpuDataManagerImpl because its
@@ -117,11 +117,9 @@ class GpuDataManagerImplPrivateTest : public testing::Test {
     DISALLOW_COPY_AND_ASSIGN(ScopedGpuDataManagerImplPrivate);
   };
 
-  virtual void SetUp() {
-  }
+  void SetUp() override {}
 
-  virtual void TearDown() {
-  }
+  void TearDown() override {}
 
   base::Time JustBeforeExpiration(const GpuDataManagerImplPrivate* manager);
   base::Time JustAfterExpiration(const GpuDataManagerImplPrivate* manager);