Allow extensions of the ManifestParser outside of the content/ layer.

chrome/renderer/chrome_content_renderer_client.h

 // Copyright (c) 2012 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 CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 132 matching lines @@
       content::RenderFrame* render_frame,
       blink::WebFrame* frame) override;
   bool AllowPepperMediaStreamAPI(const GURL& url) override;
   void AddKeySystems(std::vector<media::KeySystemInfo>* key_systems) override;
   bool IsPluginAllowedToUseDevChannelAPIs() override;
   bool IsPluginAllowedToUseCompositorAPI(const GURL& url) override;
   content::BrowserPluginDelegate* CreateBrowserPluginDelegate(
       content::RenderFrame* render_frame,
       const std::string& mime_type,
       const GURL& original_url) override;
+  bool ParseManifestProperty(const std::string& key,
+                             const base::Value& value) override;
 
 #if defined(ENABLE_EXTENSIONS)
   // Takes ownership.
   void SetExtensionDispatcherForTest(
       extensions::Dispatcher* extension_dispatcher);
   extensions::Dispatcher* GetExtensionDispatcherForTest();
 #endif
 
 #if defined(ENABLE_SPELLCHECK)
   // Sets a new |spellcheck|. Used for testing only.
@@ skipping 75 matching lines @@
   scoped_ptr<SearchBouncer> search_bouncer_;
 #if defined(ENABLE_PRINT_PREVIEW)
   scoped_ptr<ChromePDFPrintClient> pdf_print_client_;
 #endif
 #if defined(ENABLE_PLUGINS)
   std::set<std::string> allowed_compositor_origins_;
 #endif
 };
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_