Update entry page type to include error pages when appropriate.

content/browser/web_contents/web_contents_impl.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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 2556 matching lines @@
   FOR_EACH_OBSERVER(
       WebContentsObserver,
       observers_,
       ProvisionalChangeToMainFrameUrl(validated_target_url,
                                       render_frame_host));
 }
 
 void WebContentsImpl::DidCommitProvisionalLoad(
     RenderFrameHostImpl* render_frame_host,
     const GURL& url,
+    bool url_is_unreachable,
     ui::PageTransition transition_type) {
   // Notify observers about the commit of the provisional load.
-  FOR_EACH_OBSERVER(WebContentsObserver,
-                    observers_,
-                    DidCommitProvisionalLoadForFrame(
-                        render_frame_host, url, transition_type));
+  FOR_EACH_OBSERVER(
+      WebContentsObserver,
+      observers_,
+      DidCommitProvisionalLoadForFrame(
+          render_frame_host, url, url_is_unreachable, transition_type));

[wjmaclean, 2014/09/22 17:11:13]

We could avoid touching a lot of files if we stored the url_is_unreachable state
in WebContents, and retrieved it with WebContents::IsUrlReachable() ... does
that seem reasonable?

 }
 
 void WebContentsImpl::DidNavigateMainFramePreCommit(
     bool navigation_is_within_page) {
   // Ensure fullscreen mode is exited before committing the navigation to a
   // different page.  The next page will not start out assuming it is in
   // fullscreen mode.
   if (navigation_is_within_page) {
     // No page change?  Then, the renderer and browser can remain in fullscreen.
     return;
@@ skipping 1773 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content