DevTools: Implement console message logging through an extension

Source/devtools/devtools.gypi

 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #         * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #         * Redistributions in binary form must reproduce the above
@@ skipping 48 matching lines @@
             'front_end/inspectorSyntaxHighlight.css',
             'front_end/popover.css',
             '<@(devtools_main_js_files)',
             '<@(devtools_standalone_files)',
         ],
         'devtools_common_js_files': [
             'front_end/common/Color.js',
             'front_end/common/CompletionDictionary.js',
             'front_end/common/DOMExtension.js',
             'front_end/common/Geometry.js',
+            'front_end/common/MessageSink.js',
             'front_end/common/ModuleManager.js',
             'front_end/common/modules.js',
             'front_end/common/Object.js',
             'front_end/common/ParsedURL.js',
             'front_end/common/Platform.js',
             'front_end/common/Progress.js',
             'front_end/common/Settings.js',
             'front_end/common/TextRange.js',
             'front_end/common/UIString.js',
             'front_end/common/UserMetrics.js',
@@ skipping 472 matching lines @@
             'front_end/temp_storage_shared_worker/TempStorageSharedWorker.js',
         ],
         'devtools_script_formatter_worker_js_files': [
             'front_end/script_formatter_worker/CSSFormatter.js',
             'front_end/script_formatter_worker/JavaScriptFormatter.js',
             'front_end/script_formatter_worker/ScriptFormatterWorker.js',
             'front_end/common/utilities.js',
         ],
     },
 }