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 44 matching lines @@
   // Callback once a module has finished downloading. Passes data to |runner_|.
   void OnFetchModuleComplete(ResourceFetcher* fetcher,
                              const blink::WebURLResponse& response,
                              const std::string& data);
 
   // gin::ModuleRegistryObserver overrides:
   void OnDidAddPendingModule(
       const std::string& id,
       const std::vector<std::string>& dependencies) override;
 
+  // Returns the prefix to use for all module requests.
+  const std::string& GetModulePrefix();
+
   // Frame script is executed in. Also used to download resources.
   blink::WebFrame* frame_;
 
   // See description above getter.
   bool module_added_;
 
   // 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_;
 
+  // A cached copy of the prefix to use for all module requests.
+  std::string module_prefix_;
+
   DISALLOW_COPY_AND_ASSIGN(WebUIMojoContextState);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEB_UI_MOJO_CONTEXT_STATE_H_