Support auto-reload on errors.

chrome/renderer/net/net_error_helper.h

 // Copyright (c) 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 CHROME_RENDERER_NET_NET_ERROR_HELPER_H_
 #define CHROME_RENDERER_NET_NET_ERROR_HELPER_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/common/localized_error.h"
 #include "chrome/common/net/net_error_info.h"
 #include "chrome/renderer/net/net_error_helper_core.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "content/public/renderer/render_frame_observer_tracker.h"
+#include "content/public/renderer/render_process_observer.h"
 
 class GURL;
 
 namespace content {
 class ResourceFetcher;
 }
 
 namespace blink {
 class WebFrame;
 class WebURLResponse;
 struct WebURLError;
 }
 
 // Listens for NetErrorInfo messages from the NetErrorTabHelper on the
 // browser side and updates the error page with more details (currently, just
 // DNS probe results) if/when available.
 class NetErrorHelper
     : public content::RenderFrameObserver,
       public content::RenderFrameObserverTracker<NetErrorHelper>,
+      public content::RenderProcessObserver,
       public NetErrorHelperCore::Delegate {
  public:
   explicit NetErrorHelper(content::RenderFrame* render_view);
   virtual ~NetErrorHelper();
 
   // RenderFrameObserver implementation.
   virtual void DidStartProvisionalLoad() OVERRIDE;
   virtual void DidCommitProvisionalLoad(bool is_new_navigation) OVERRIDE;
   virtual void DidFinishLoad() OVERRIDE;
   virtual void OnStop() OVERRIDE;
 
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  // RenderProcessObserver implementation.
+  virtual void NetworkStateChanged(bool online) OVERRIDE;
+
   // Examines |frame| and |error| to see if this is an error worthy of a DNS
   // probe.  If it is, initializes |error_strings| based on |error|,
   // |is_failed_post|, and |locale| with suitable strings and returns true.
   // If not, returns false, in which case the caller should look up error
   // strings directly using LocalizedError::GetNavigationErrorStrings.
   //
   // Updates the NetErrorHelper with the assumption the page will be loaded
   // immediately.
   void GetErrorHTML(blink::WebFrame* frame,
                     const blink::WebURLError& error,
                     bool is_failed_post,
                     std::string* error_html);
 
+  // Returns whether a load for |url| in |frame| should have its error page
+  // suppressed.
+  bool ShouldSuppressErrorPage(blink::WebFrame* frame, const GURL& url);
+
  private:
   // NetErrorHelperCore::Delegate implementation:
   virtual void GenerateLocalizedErrorPage(
       const blink::WebURLError& error,
       bool is_failed_post,
       scoped_ptr<LocalizedError::ErrorPageParams> params,
       std::string* html) const OVERRIDE;
   virtual void LoadErrorPageInMainFrame(const std::string& html,
                                         const GURL& failed_url) OVERRIDE;
   virtual void UpdateErrorPage(const blink::WebURLError& error,
                                bool is_failed_post) OVERRIDE;
   virtual void FetchNavigationCorrections(
       const GURL& navigation_correction_url,
       const std::string& navigation_correction_request_body) OVERRIDE;
   virtual void CancelFetchNavigationCorrections() OVERRIDE;
+  virtual void ReloadPage() OVERRIDE;
 
   void OnNetErrorInfo(int status);
   void OnSetNavigationCorrectionInfo(const GURL& navigation_correction_url,
                                      const std::string& language,
                                      const std::string& country_code,
                                      const std::string& api_key,
                                      const GURL& search_url);
 
   void OnNavigationCorrectionsFetched(const blink::WebURLResponse& response,
                                       const std::string& data);
 
   scoped_ptr<content::ResourceFetcher> correction_fetcher_;
 
   NetErrorHelperCore core_;
 };
 
 #endif  // CHROME_RENDERER_NET_NET_ERROR_HELPER_H_