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/browser_devtools_callargs.cc

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "browser_devtools_callargs.h"
+#include "libcef/browser_devtools_callargs.h"
 
 #include "base/logging.h"
 
@@ -23,5 +23,5 @@ BrowserDevToolsCallArgs::BrowserDevToolsCallArgs(
 
 BrowserDevToolsCallArgs::~BrowserDevToolsCallArgs() {
   --calls_count_;
-  DCHECK(calls_count_ >= 0);
+  DCHECK_GE(calls_count_, 0);
 }