Fix initial erroneous navigation in iframe to not add history entry.

content/renderer/render_view_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/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 3394 matching lines @@
       const content::PasswordForm* old_password_form =
           old_document_state->password_form_data();
       if (old_password_form) {
         document_state->set_password_form_data(
             make_scoped_ptr(new content::PasswordForm(*old_password_form)));
       }
     }
 
     // Make sure redirect tracking state is clear for the new load.
     completed_client_redirect_src_ = Referrer();
-  } else if (frame->parent()->isLoading()) {
+  } else if (frame->parent()->isLoading() ||
+      document_state->navigation_state()->pending_page_id() == -1) {
     // Take note of AUTO_SUBFRAME loads here, so that we can know how to
     // load an error page.  See didFailProvisionalLoad.
     document_state->navigation_state()->set_transition_type(
         PAGE_TRANSITION_AUTO_SUBFRAME);
   }
 
   FOR_EACH_OBSERVER(
       RenderViewObserver, observers_, DidStartProvisionalLoad(frame));
 
   Send(new ViewHostMsg_DidStartProvisionalLoadForFrame(
@@ skipping 3114 matching lines @@
     WebURL url = icon_urls[i].iconURL();
     if (!url.isEmpty())
       urls.push_back(FaviconURL(url,
                                 ToFaviconType(icon_urls[i].iconType())));
   }
   SendUpdateFaviconURL(urls);
 }
 
 
 }  // namespace content