Standardize usage of virtual/override/final specifiers.

content/renderer/render_view_browsertest.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/shared_memory.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 123 matching lines @@
 
 }  // namespace
 
 class RenderViewImplTest : public RenderViewTest {
  public:
   RenderViewImplTest() {
     // Attach a pseudo keyboard device to this object.
     mock_keyboard_.reset(new MockKeyboard());
   }
 
-  virtual ~RenderViewImplTest() {}
+  ~RenderViewImplTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     RenderViewTest::SetUp();
     // Enable Blink's experimental and test only features so that test code
     // does not have to bother enabling each feature.
     WebRuntimeFeatures::enableExperimentalFeatures(true);
     WebRuntimeFeatures::enableTestOnlyFeatures(true);
   }
 
   RenderViewImpl* view() {
     return static_cast<RenderViewImpl*>(view_);
   }
@@ skipping 2336 matching lines @@
   ProcessPendingMessages();
   base::Time after_navigation =
       base::Time::Now() + base::TimeDelta::FromDays(1);
 
   base::Time late_nav_reported_start =
       base::Time::FromDoubleT(GetMainFrame()->performance().navigationStart());
   EXPECT_LE(late_nav_reported_start, after_navigation);
 }
 
 }  // namespace content