Make profiling lock global rather than per Target

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 49 matching lines @@
             'front_end/suggestBox.css',
             'front_end/tabbedPane.css',
             '<@(devtools_main_js_files)',
             '<@(devtools_standalone_files)',
         ],
         'devtools_common_js_files': [
             'front_end/common/Color.js',
             'front_end/common/Console.js',
             'front_end/common/ContentProvider.js',
             'front_end/common/Geometry.js',
+            'front_end/common/Lock.js',
             'front_end/common/ModuleExtensionInterfaces.js',
             'front_end/common/modules.js',
             'front_end/common/NotificationService.js',
             'front_end/common/Object.js',
             'front_end/common/ParsedURL.js',
             'front_end/common/Progress.js',
             'front_end/common/ResourceType.js',
             'front_end/common/Settings.js',
             'front_end/common/StaticContentProvider.js',
             'front_end/common/TextRange.js',
@@ skipping 545 matching lines @@
             'front_end/Images/thumbHoverHoriz.png',
             'front_end/Images/thumbHoverVert.png',
             'front_end/Images/thumbVert.png',
             'front_end/Images/toolbarItemSelected.png',
         ],
         'devtools_extension_api_files': [
             'front_end/extensions/ExtensionAPI.js',
         ],
     },
 }