Move detached files from web/ to (core/modules)/exported.

third_party/WebKit/Source/core/exported/WebHistoryItem.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 204 matching lines @@
 WebHistoryItem& WebHistoryItem::operator=(HistoryItem* item) {
   private_ = item;
   return *this;
 }
 
 WebHistoryItem::operator HistoryItem*() const {
   return private_.Get();
 }
 
 }  // namespace blink