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

content/browser/plugin_service_impl_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 "content/browser/plugin_service_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
@@ skipping 163 matching lines @@
 
 // A strict mock that fails if any of the methods are called. They shouldn't be
 // called since the request should get canceled before then.
 class MockCanceledPluginServiceClient : public PluginProcessHost::Client {
  public:
   MockCanceledPluginServiceClient(ResourceContext* context)
       : context_(context),
         get_resource_context_called_(false) {
   }
 
-  virtual ~MockCanceledPluginServiceClient() {}
+  ~MockCanceledPluginServiceClient() override {}
 
   // Client implementation.
   MOCK_METHOD0(ID, int());
-  virtual ResourceContext* GetResourceContext() override {
+  ResourceContext* GetResourceContext() override {
     get_resource_context_called_ = true;
     return context_;
   }
   MOCK_METHOD0(OffTheRecord, bool());
   MOCK_METHOD1(OnFoundPluginProcessHost, void(PluginProcessHost* host));
   MOCK_METHOD0(OnSentPluginChannelRequest, void());
   MOCK_METHOD1(OnChannelOpened, void(const IPC::ChannelHandle& handle));
   MOCK_METHOD1(SetPluginInfo, void(const WebPluginInfo& info));
   MOCK_METHOD0(OnError, void());
 
@@ skipping 161 matching lines @@
       BrowserThread::IO, FROM_HERE,
       base::Bind(&OpenChannel, &mock_client));
   RunMessageLoop();
   EXPECT_TRUE(mock_client.get_resource_context_called());
   EXPECT_TRUE(mock_client.set_plugin_info_called());
   EXPECT_TRUE(mock_client.on_found_plugin_process_host_called());
   EXPECT_TRUE(mock_client.on_sent_plugin_channel_request_called());
 }
 
 }  // namespace content