Create FrameNavigationEntries for the initial blank page in subframes.

content/browser/frame_host/navigation_controller_impl.cc

 // 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.
 
 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  *     (http://www.torchmobile.com/)
  *
@@ skipping 396 matching lines @@
   int index = GetEntryIndexWithPageID(instance, page_id);
   return (index != -1) ? entries_[index] : nullptr;
 }
 
 NavigationEntryImpl*
 NavigationControllerImpl::GetEntryWithUniqueID(int nav_entry_id) const {
   int index = GetEntryIndexWithUniqueID(nav_entry_id);
   return (index != -1) ? entries_[index] : nullptr;
 }
 
-bool NavigationControllerImpl::HasCommittedRealLoad(
-    FrameTreeNode* frame_tree_node) const {
-  NavigationEntryImpl* last_committed = GetLastCommittedEntry();
-  return last_committed && last_committed->GetFrameEntry(frame_tree_node);
-}
-
 void NavigationControllerImpl::LoadEntry(
     scoped_ptr<NavigationEntryImpl> entry) {
   // When navigating to a new page, we don't know for sure if we will actually
   // end up leaving the current page.  The new page load could for example
   // result in a download or a 'no content' response (e.g., a mailto: URL).
   SetPendingEntry(entry.Pass());
   NavigateToPendingEntry(NO_RELOAD);
 }
 
 void NavigationControllerImpl::SetPendingEntry(
@@ skipping 1555 matching lines @@
     }
   }
 }
 
 void NavigationControllerImpl::SetGetTimestampCallbackForTest(
     const base::Callback<base::Time()>& get_timestamp_callback) {
   get_timestamp_callback_ = get_timestamp_callback;
 }
 
 }  // namespace content