Revert of Serve mojo WebUI resources from the same origin as the WebUI itself.

content/renderer/web_ui_mojo_context_state.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_WEB_UI_MOJO_CONTEXT_STATE_H_
 #define CONTENT_RENDERER_WEB_UI_MOJO_CONTEXT_STATE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 59 matching lines @@
 
   // Executes the script from gin.
   scoped_ptr<WebUIRunner> runner_;
 
   // Set of fetchers we're waiting on to download script.
   ScopedVector<ResourceFetcher> module_fetchers_;
 
   // Set of modules we've fetched script from.
   std::set<std::string> fetched_modules_;
 
-  // The prefix to use for all module requests.
-  const std::string module_prefix_;
-
   DISALLOW_COPY_AND_ASSIGN(WebUIMojoContextState);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEB_UI_MOJO_CONTEXT_STATE_H_