Update {virtual,override} to follow C++11 style in content.

content/test/content_test_suite.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.
 
 #include "content/test/content_test_suite.h"
 
 #if defined(OS_ANDROID)
 #include <android/native_window.h>
 #include <android/native_window_jni.h>
 #include <map>
@@ skipping 34 matching lines @@
 #endif
 
 namespace content {
 namespace {
 
 class TestInitializationListener : public testing::EmptyTestEventListener {
  public:
   TestInitializationListener() : test_content_client_initializer_(NULL) {
   }
 
-  virtual void OnTestStart(const testing::TestInfo& test_info) override {
+  void OnTestStart(const testing::TestInfo& test_info) override {
     test_content_client_initializer_ =
         new content::TestContentClientInitializer();
   }
 
-  virtual void OnTestEnd(const testing::TestInfo& test_info) override {
+  void OnTestEnd(const testing::TestInfo& test_info) override {
     delete test_content_client_initializer_;
   }
 
  private:
   content::TestContentClientInitializer* test_content_client_initializer_;
 
   DISALLOW_COPY_AND_ASSIGN(TestInitializationListener);
 };
 
 #if defined(OS_ANDROID)
@@ skipping 62 matching lines @@
 #endif
   testing::TestEventListeners& listeners =
       testing::UnitTest::GetInstance()->listeners();
   listeners.Append(new TestInitializationListener);
 #if defined(OS_ANDROID)
   SurfaceTextureManager::InitInstance(new SurfaceTextureManagerImpl);
 #endif
 }
 
 }  // namespace content