Use a direct include of strings headers in content/browser/, part 1.

content/browser/download/save_item.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/download/save_item.h"
 
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "content/browser/download/save_file.h"
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/download/save_package.h"
 
 namespace content {
 
 // Constructor for SaveItem when creating each saving job.
 SaveItem::SaveItem(const GURL& url,
                    const Referrer& referrer,
                    SavePackage* package,
@@ skipping 105 matching lines @@
   DCHECK_EQ(-1, save_id_);
   save_id_ = save_id;
 }
 
 void SaveItem::SetTotalBytes(int64 total_bytes) {
   DCHECK_EQ(0, total_bytes_);
   total_bytes_ = total_bytes;
 }
 
 }  // namespace content