Prevent bindings escalation on an existing NavigationEntry.

content/browser/web_contents/navigation_entry_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/navigation_entry_impl.h"
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/url_constants.h"
@@ skipping 18 matching lines @@
 }
 
 NavigationEntryImpl* NavigationEntryImpl::FromNavigationEntry(
     NavigationEntry* entry) {
   return static_cast<NavigationEntryImpl*>(entry);
 }
 
 NavigationEntryImpl::NavigationEntryImpl()
     : unique_id_(GetUniqueIDInConstructor()),
       site_instance_(NULL),
+      bindings_(0),
       page_type_(PAGE_TYPE_NORMAL),
       update_virtual_url_with_url_(false),
       page_id_(-1),
       transition_type_(PAGE_TRANSITION_LINK),
       has_post_data_(false),
       post_id_(-1),
       restore_type_(RESTORE_NONE),
       is_overriding_user_agent_(false),
       is_renderer_initiated_(false),
       should_replace_entry_(false),
@@ skipping 229 matching lines @@
 const std::string& NavigationEntryImpl::GetFrameToNavigate() const {
   return frame_to_navigate_;
 }
 
 void NavigationEntryImpl::SetScreenshotPNGData(
     const std::vector<unsigned char>& png_data) {
   screenshot_ = png_data.empty() ? NULL : new base::RefCountedBytes(png_data);
 }
 
 }  // namespace content