Move unique name generation and tracking into //content.

third_party/WebKit/Source/core/loader/HistoryItem.cpp

 /*
  * Copyright (C) 2005, 2006, 2008, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 45 matching lines @@
 }
 
 KURL HistoryItem::url() const {
   return KURL(ParsedURLString, m_urlString);
 }
 
 const Referrer& HistoryItem::referrer() const {
   return m_referrer;
 }
 
-const String& HistoryItem::target() const {
-  return m_target;
-}
-
 void HistoryItem::setURLString(const String& urlString) {
   if (m_urlString != urlString)
     m_urlString = urlString;
 }
 
 void HistoryItem::setURL(const KURL& url) {
   setURLString(url.getString());
 }
 
 void HistoryItem::setReferrer(const Referrer& referrer) {
   // This should be a RELEASE_ASSERT.
   m_referrer = SecurityPolicy::generateReferrer(referrer.referrerPolicy, url(),
                                                 referrer.referrer);
 }
 
-void HistoryItem::setTarget(const String& target) {
-  m_target = target;
-}
-
 const ScrollOffset& HistoryItem::visualViewportScrollOffset() const {
   return m_visualViewportScrollOffset;
 }
 
 void HistoryItem::setVisualViewportScrollOffset(const ScrollOffset& offset) {
   m_visualViewportScrollOffset = offset;
   setDidSaveScrollOrScaleState(true);
 }
 
 const ScrollOffset& HistoryItem::getScrollOffset() const {
@@ skipping 75 matching lines @@
   // FIXME: We should find a better way to check if this is the current
   // document.
   return equalIgnoringFragmentIdentifier(url(), doc->url());
 }
 
 DEFINE_TRACE(HistoryItem) {
   visitor->trace(m_documentState);
 }
 
 }  // namespace blink