DevTools: Add support for adding source map to a script from the DevTools window.

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 334 matching lines @@
             'front_end/network/RequestHTMLView.js',
             'front_end/network/RequestJSONView.js',
             'front_end/network/RequestPreviewView.js',
             'front_end/network/RequestResponseView.js',
             'front_end/network/RequestTimingView.js',
             'front_end/network/RequestView.js',
             'front_end/network/ResourceWebSocketFrameView.js',
             'front_end/network/NetworkPanel.js',
         ],
         'devtools_sources_js_files': [
+            'front_end/sources/AddSourceMapURLDialog.js',
             'front_end/sources/AdvancedSearchView.js',
             'front_end/sources/BreakpointsSidebarPane.js',
             'front_end/sources/CSSSourceFrame.js',
             'front_end/sources/CallStackSidebarPane.js',
             'front_end/sources/EditingLocationHistoryManager.js',
             'front_end/sources/FileBasedSearchResultsPane.js',
             'front_end/sources/FilePathScoreFunction.js',
             'front_end/sources/FilteredItemSelectionDialog.js',
             'front_end/sources/InplaceFormatterEditorAction.js',
             'front_end/sources/JavaScriptSourceFrame.js',
@@ skipping 203 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',
         ],
     },
 }