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

content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.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 <string>
 #include <queue>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
@@ skipping 97 matching lines @@
         render_frame_id, page_request_id, type, security_origin);
   }
 
   std::string label_;
   StreamDeviceInfoArray audio_devices_;
   StreamDeviceInfoArray video_devices_;
   StreamDeviceInfo opened_device_;
   StreamDeviceInfoArray enumerated_devices_;
 
  private:
-  virtual ~MockMediaStreamDispatcherHost() {}
+  ~MockMediaStreamDispatcherHost() override {}
 
   // This method is used to dispatch IPC messages to the renderer. We intercept
   // these messages here and dispatch to our mock methods to verify the
   // conversation between this object and the renderer.
-  virtual bool Send(IPC::Message* message) override {
+  bool Send(IPC::Message* message) override {
     CHECK(message);
     current_ipc_ = message;
 
     // In this method we dispatch the messages to the according handlers as if
     // we are the renderer.
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(MockMediaStreamDispatcherHost, *message)
       IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerated,
                           OnStreamGeneratedInternal)
       IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerationFailed,
@@ skipping 784 matching lines @@
 
 TEST_F(MediaStreamDispatcherHostTest, EnumerateVideoDevicesNoAccess) {
   SetupFakeUI(false);
   stream_ui_->SetCameraAccess(false);
   EnumerateDevicesAndWaitForResult(kRenderId, kPageRequestId,
                                    MEDIA_DEVICE_VIDEO_CAPTURE);
   EXPECT_TRUE(DoesNotContainLabels(host_->enumerated_devices_));
 }
 
 };  // namespace content