Standardize usage of virtual/override/final specifiers.

content/renderer/render_thread_impl_browsertest.cc

 // Copyright 2013 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/command_line.h"
 #include "base/memory/discardable_memory.h"
 #include "base/memory/scoped_vector.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/test/mock_render_process.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 namespace {
 
 class RenderThreadImplBrowserTest : public testing::Test {
  public:
-  virtual ~RenderThreadImplBrowserTest() {}
+  ~RenderThreadImplBrowserTest() override {}
 };
 
 class DummyListener : public IPC::Listener {
  public:
   bool OnMessageReceived(const IPC::Message& message) override { return true; }
 };
 
 void CheckRenderThreadInputHandlerManager(RenderThreadImpl* thread) {
   ASSERT_TRUE(thread->input_handler_manager());
 }
@@ skipping 90 matching lines @@
     if ((*iter)->Lock() == base::DISCARDABLE_MEMORY_LOCK_STATUS_SUCCESS)
       ++blocks_left;
   }
   EXPECT_LE(blocks_left, 1);
 
   thread->WidgetDestroyed();
 }
 
 }  // namespace
 }  // namespace content