Standardize usage of virtual/override/final specifiers.

content/renderer/media/webrtc/peer_connection_dependency_factory_unittest.cc

 // Copyright 2014 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/renderer/media/mock_web_rtc_peer_connection_handler_client.h"
 #include "content/renderer/media/webrtc/mock_peer_connection_dependency_factory.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h"
 
 namespace content {
 
 class PeerConnectionDependencyFactoryTest : public ::testing::Test {
  public:
-  virtual void SetUp() {
+  void SetUp() override {
     dependency_factory_.reset(new MockPeerConnectionDependencyFactory());
   }
 
  protected:
   scoped_ptr<MockPeerConnectionDependencyFactory> dependency_factory_;
 };
 
 TEST_F(PeerConnectionDependencyFactoryTest, CreateRTCPeerConnectionHandler) {
   MockWebRTCPeerConnectionHandlerClient client_jsep;
   scoped_ptr<blink::WebRTCPeerConnectionHandler> pc_handler(
       dependency_factory_->CreateRTCPeerConnectionHandler(&client_jsep));
   EXPECT_TRUE(pc_handler.get() != NULL);
 }
 
 }  // namespace content