Add a flag showing whether the current request was ignored by a handler

chrome/browser/extensions/api/web_navigation/web_navigation_api.cc

 // 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.
 
 // Implements the Chrome Extensions WebNavigation API.
 
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 322 matching lines @@
   }
   helpers::DispatchOnCommitted(event_name, web_contents(), render_frame_host,
                                navigation_state_.GetUrl(render_frame_host),
                                transition_type);
 }
 
 void WebNavigationTabObserver::DidFailProvisionalLoad(
     content::RenderFrameHost* render_frame_host,
     const GURL& validated_url,
     int error_code,
-    const base::string16& error_description) {
+    const base::string16& error_description,
+    bool was_ignored_by_handler) {
   DVLOG(2) << "DidFailProvisionalLoad("
            << "render_frame_host=" << render_frame_host
            << ", frame_num=" << render_frame_host->GetRoutingID()
            << ", url=" << validated_url << ")";
   if (navigation_state_.CanSendEvents(render_frame_host)) {
     helpers::DispatchOnErrorOccurred(
         web_contents(),
         render_frame_host,
         navigation_state_.GetUrl(render_frame_host),
         error_code);
@@ skipping 53 matching lines @@
     return;
   helpers::DispatchOnCompleted(web_contents(),
                                render_frame_host,
                                navigation_state_.GetUrl(render_frame_host));
 }
 
 void WebNavigationTabObserver::DidFailLoad(
     content::RenderFrameHost* render_frame_host,
     const GURL& validated_url,
     int error_code,
-    const base::string16& error_description) {
+    const base::string16& error_description,
+    bool was_ignored_by_handler) {
   DVLOG(2) << "DidFailLoad("
            << "render_frame_host=" << render_frame_host
            << ", frame_num=" << render_frame_host->GetRoutingID()
            << ", url=" << validated_url << ")";
   // When showing replacement content, we might get load signals for frames
   // that weren't reguarly loaded.
   if (!navigation_state_.IsValidFrame(render_frame_host))
     return;
   if (navigation_state_.CanSendEvents(render_frame_host)) {
     helpers::DispatchOnErrorOccurred(
@@ skipping 191 matching lines @@
   return g_factory.Pointer();
 }
 
 void WebNavigationAPI::OnListenerAdded(const EventListenerInfo& details) {
   web_navigation_event_router_.reset(new WebNavigationEventRouter(
       Profile::FromBrowserContext(browser_context_)));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 }  // namespace extensions