Convert string16 to base::string16 in content.

content/browser/download/drag_download_util.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_UTIL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_UTIL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
@@ skipping 14 matching lines @@
 
 // Parse the download metadata set in DataTransfer.setData. The metadata
 // consists of a set of the following values separated by ":"
 // * MIME type
 // * File name
 // * URL
 // If the file name contains special characters, they need to be escaped
 // appropriately.
 // For example, we can have
 //   text/plain:example.txt:http://example.com/example.txt
-bool ParseDownloadMetadata(const string16& metadata,
-                           string16* mime_type,
+bool ParseDownloadMetadata(const base::string16& metadata,
+                           base::string16* mime_type,
                            base::FilePath* file_name,
                            GURL* url);
 
 // Create a new file at the specified path. If the file already exists, try to
 // insert the sequential unifier to produce a new file, like foo-01.txt.
 // Return a FileStream if successful.
 // |net_log| is a NetLog for the stream.
 CONTENT_EXPORT net::FileStream* CreateFileStreamForDrop(
     base::FilePath* file_path, net::NetLog* net_log);
 
@@ skipping 13 matching lines @@
   void Cleanup();
 
   scoped_refptr<DragDownloadFile> drag_file_downloader_;
 
   DISALLOW_COPY_AND_ASSIGN(PromiseFileFinalizer);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_UTIL_H_