Add support for distilling arbitrary URLs in DOM Distiller Viewer.

components/dom_distiller/webui/dom_distiller_handler.h

 // Copyright 2013 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 COMPONENTS_DOM_DISTILLER_WEBUI_DOM_DISTILLER_HANDLER_H_
 #define COMPONENTS_DOM_DISTILLER_WEBUI_DOM_DISTILLER_HANDLER_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 namespace dom_distiller {
 
 class DomDistillerService;
 
 // Handler class for DOM Distiller list operations.
 class DomDistillerHandler : public content::WebUIMessageHandler {
  public:
   // The lifetime of |service| has to outlive this handler.
-  DomDistillerHandler(DomDistillerService* service,
-                      const std::string& scheme);
+  DomDistillerHandler(DomDistillerService* service, const std::string& scheme);
   virtual ~DomDistillerHandler();
 
   // content::WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
 
   // Callback from JavaScript for the "requestEntries" message. This
   // requests the list of entries and returns it to the front end by calling
   // "onReceivedEntries". There are no JavaScript arguments to this method.
   void HandleRequestEntries(const base::ListValue* args);
 
   // Callback from JavaScript for when an article should be added. The first
   // element in |args| should be a string representing the URL to be added.
   void HandleAddArticle(const base::ListValue* args);
 
   // Callback from JavaScript for when an article is selected. The first element
   // in |args| should be a string representing the ID of the entry to be
   // selected.
   void HandleSelectArticle(const base::ListValue* args);
 
+  // Callback from JavaScript for when viewing a URL is requested. The first
+  // element in |args| should be a string representing the URL to be viewed.
+  void HandleViewUrl(const base::ListValue* args);
+
  private:
   // Callback from DomDistillerService when an article is available.
   void OnArticleAdded(bool article_available);
 
   // The DomDistillerService.
   DomDistillerService* service_;
 
   // The scheme for DOM distiller articles.
   std::string article_scheme_;
 
   // Factory for the creating refs in callbacks.
   base::WeakPtrFactory<DomDistillerHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DomDistillerHandler);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_WEBUI_DOM_DISTILLER_HANDLER_H_