DevTools: Add support for //# sourceURL (sourceMappingURL) comments and deprecate //@ ones

Source/devtools/front_end/View.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
@@ skipping 340 matching lines @@
             styleElement.type = "text/css";
             styleElement.textContent = xhr.responseText + this._buildSourceURL(cssFile);
         }
         document.head.insertBefore(styleElement, document.head.firstChild);
 
         WebInspector.View._cssFileToStyleElement[cssFile] = styleElement;
     },
 
     _buildSourceURL: function(cssFile)
     {
-        return "\n/*@ sourceURL=" + WebInspector.ParsedURL.completeURL(window.location.href, cssFile) + " */";
+        return "\n/*# sourceURL=" + WebInspector.ParsedURL.completeURL(window.location.href, cssFile) + " */";
     },
 
     _disableCSSIfNeeded: function()
     {
         var scheduleUnload = !!WebInspector.View._cssUnloadTimer;
 
         for (var i = 0; i < this._cssFiles.length; ++i) {
             var cssFile = this._cssFiles[i];
 
             if (!--WebInspector.View._cssFileToVisibleViewCount[cssFile])
@@ skipping 134 matching lines @@
 {
     WebInspector.View._assert(!child.__viewCounter && !child.__view, "Attempt to remove element containing view via regular DOM operation");
     return WebInspector.View._originalRemoveChild.call(this, child);
 }
 
 Element.prototype.removeChildren = function()
 {
     WebInspector.View._assert(!this.__viewCounter, "Attempt to remove element containing view via regular DOM operation");
     WebInspector.View._originalRemoveChildren.call(this);
 }