DevTools: Add scripts sourceURL plumbing from v8.

Source/bindings/core/v8/DebuggerScript.js

 /*
  * Copyright (C) 2010 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 140 matching lines @@
     } else {
         if (lineCount === 1)
             endColumn = script.source.length + script.column_offset;
         else
             endColumn = script.source.length - (lineEnds[lineCount - 2] + 1);
     }
 
     return {
         id: script.id,
         name: script.nameOrSourceURL(),
+        sourceURL: script.source_url,
+        sourceMappingURL: script.source_mapping_url,
         source: script.source,
         startLine: script.line_offset,
         startColumn: script.column_offset,
         endLine: endLine,
         endColumn: endColumn,
         isContentScript: !!script.context_data && script.context_data.indexOf("injected") == 0
     };
 }
 
 DebuggerScript.setBreakpoint = function(execState, info)
@@ skipping 333 matching lines @@
         break;
     }
     return result;
 }
 
 // We never resolve Mirror by its handle so to avoid memory leaks caused by Mirrors in the cache we disable it.
 ToggleMirrorCache(false);
 
 return DebuggerScript;
 })();