Enable cpplint for webrtc/examples and fix all uncovered cpplint errors.

webrtc/examples/peerconnection/client/main_wnd.h

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef PEERCONNECTION_SAMPLES_CLIENT_MAIN_WND_H_
-#define PEERCONNECTION_SAMPLES_CLIENT_MAIN_WND_H_
+#ifndef WEBRTC_EXAMPLES_PEERCONNECTION_CLIENT_MAIN_WND_H_
+#define WEBRTC_EXAMPLES_PEERCONNECTION_CLIENT_MAIN_WND_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "talk/app/webrtc/mediastreaminterface.h"
 #include "webrtc/examples/peerconnection/client/peer_connection_client.h"
 #include "talk/media/base/mediachannel.h"
 #include "talk/media/base/videocommon.h"
 #include "talk/media/base/videoframe.h"
@@ skipping 30 matching lines @@
                           bool is_error) = 0;
 
   virtual UI current_ui() = 0;
 
   virtual void SwitchToConnectUI() = 0;
   virtual void SwitchToPeerList(const Peers& peers) = 0;
   virtual void SwitchToStreamingUI() = 0;
 
   virtual void StartLocalRenderer(webrtc::VideoTrackInterface* local_video) = 0;
   virtual void StopLocalRenderer() = 0;
-  virtual void StartRemoteRenderer(webrtc::VideoTrackInterface* remote_video) = 0;
+  virtual void StartRemoteRenderer(
+      webrtc::VideoTrackInterface* remote_video) = 0;
   virtual void StopRemoteRenderer() = 0;
 
   virtual void QueueUIThreadCallback(int msg_id, void* data) = 0;
 };
 
 #ifdef WIN32
 
 class MainWnd : public MainWindow {
  public:
   static const wchar_t kClassName[];
@@ skipping 116 matching lines @@
   void* nested_msg_;
   MainWndCallback* callback_;
   static ATOM wnd_class_;
   std::string server_;
   std::string port_;
   bool auto_connect_;
   bool auto_call_;
 };
 #endif  // WIN32
 
-#endif  // PEERCONNECTION_SAMPLES_CLIENT_MAIN_WND_H_
+#endif  // WEBRTC_EXAMPLES_PEERCONNECTION_CLIENT_MAIN_WND_H_