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

Source/devtools/front_end/sources/SourcesPanel.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2011 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 importScript("jsdifflib.js")
 importScript("Placard.js");
+importScript("AddSourceMapURLDialog.js");
 importScript("BreakpointsSidebarPane.js");
 importScript("CallStackSidebarPane.js");
 importScript("SimpleHistoryManager.js");
 importScript("EditingLocationHistoryManager.js");
 importScript("FilePathScoreFunction.js");
 importScript("FilteredItemSelectionDialog.js");
 importScript("UISourceCodeFrame.js");
 importScript("JavaScriptSourceFrame.js");
 importScript("CSSSourceFrame.js");
 importScript("NavigatorView.js");
@@ skipping 1435 matching lines @@
      */
     handleAction: function()
     {
         var panel = /** @type {?WebInspector.SourcesPanel} */ (WebInspector.inspectorView.showPanel("sources"));
         if (!panel)
             return false;
         panel.togglePause();
         return true;
     }
 }