PlzNavigate: Show error pages when the navigation failed before commit

content/renderer/render_frame_impl.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 CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 639 matching lines @@
                               const std::vector<int>& selected_indices);
 #elif defined(OS_MACOSX)
   void OnSelectPopupMenuItem(int selected_index);
   void OnCopyToFindPboard();
 #endif
 
   void OnCommitNavigation(const ResourceResponseHead& response,
                           const GURL& stream_url,
                           const CommonNavigationParams& common_params,
                           const RequestNavigationParams& request_params);
+  void OnFailedNavigation(const CommonNavigationParams& common_params,
+                          const RequestNavigationParams& request_params,
+                          bool has_stale_copy_in_cache,
+                          int error_code);
 
   // Virtual since overridden by WebTestProxy for layout tests.
   virtual blink::WebNavigationPolicy DecidePolicyForNavigation(
       RenderFrame* render_frame,
       const NavigationPolicyInfo& info);
   void OpenURL(blink::WebFrame* frame,
                const GURL& url,
                const Referrer& referrer,
                blink::WebNavigationPolicy policy);
 
@@ skipping 59 matching lines @@
 
   // PlzNavigate
   // Sends a FrameHostMsg_BeginNavigation to the browser based on the contents
   // of the WebURLRequest.
   void BeginNavigation(blink::WebURLRequest* request);
 
   // Loads a data url.
   void LoadDataURL(const CommonNavigationParams& params,
                    blink::WebFrame* frame);
 
+  // Sends a proper FrameHostMsg_DidFailProvisionalLoadWithError_Params IPC for
+  // the failed request |request|.
+  void SendFailedProvisionalLoad(const blink::WebURLRequest& request,
+                                 const blink::WebURLError& error,
+                                 blink::WebLocalFrame* frame);
+
+  bool ShouldDisplayErrorPageForFailedLoad(int error_code,
+                                           const GURL& unreachable_url);
+
   // Returns the URL being loaded by the |frame_|'s request.
   GURL GetLoadingUrl() const;
 
   // If we initiated a navigation, this function will populate |document_state|
   // with the navigation information saved in OnNavigate().
   void PopulateDocumentStateFromPending(DocumentState* document_state);
 
   // Returns a new NavigationState populated with the navigation information
   // saved in OnNavigate().
   NavigationState* CreateNavigationStateFromPending();
@@ skipping 175 matching lines @@
 #endif
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_