Make CEF compliant with Google/Chromium style (issue #473).

- Add a new check_style tool based on Google's cpplint that can be used to verify compliance of pending changes and specific files/directories.
- Update existing CEF source code to be compliant with the style requirements.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@463 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef_dll/ctocpp/drag_data_ctocpp.h

@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Embedded Framework Authors. All rights
+// Copyright (c) 2012 The Chromium Embedded Framework Authors. All rights
 // reserved. Use of this source code is governed by a BSD-style license that
 // can be found in the LICENSE file.
 //
@@ -10,13 +10,15 @@
 // for more information.
 //
 
-#ifndef _DRAGDATA_CTOCPP_H
-#define _DRAGDATA_CTOCPP_H
+#ifndef CEF_LIBCEF_DLL_CTOCPP_DRAG_DATA_CTOCPP_H_
+#define CEF_LIBCEF_DLL_CTOCPP_DRAG_DATA_CTOCPP_H_
+#pragma once
 
 #ifndef USING_CEF_SHARED
 #pragma message("Warning: "__FILE__" may be accessed wrapper-side only")
-#else // USING_CEF_SHARED
+#else  // USING_CEF_SHARED
 
+#include <vector>
 #include "include/cef_drag_data.h"
 #include "include/capi/cef_drag_data_capi.h"
 #include "libcef_dll/ctocpp/ctocpp.h"
@@ -24,10 +26,9 @@
 // Wrap a C structure with a C++ class.
 // This class may be instantiated and accessed wrapper-side only.
 class CefDragDataCToCpp
-    : public CefCToCpp<CefDragDataCToCpp, CefDragData, cef_drag_data_t>
-{
-public:
-  CefDragDataCToCpp(cef_drag_data_t* str)
+    : public CefCToCpp<CefDragDataCToCpp, CefDragData, cef_drag_data_t> {
+ public:
+  explicit CefDragDataCToCpp(cef_drag_data_t* str)
       : CefCToCpp<CefDragDataCToCpp, CefDragData, cef_drag_data_t>(str) {}
   virtual ~CefDragDataCToCpp() {}
 
@@ -46,6 +47,6 @@ public:
   virtual bool GetFileNames(std::vector<CefString>& names) OVERRIDE;
 };
 
-#endif // USING_CEF_SHARED
-#endif // _DRAGDATA_CTOCPP_H
+#endif  // USING_CEF_SHARED
+#endif  // CEF_LIBCEF_DLL_CTOCPP_DRAG_DATA_CTOCPP_H_