Update some uses of char16 to use the base:: namespace.

content/browser/download/drag_download_util.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/drag_download_util.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/file_stream.h"
 #include "net/base/net_errors.h"
 #include "url/gurl.h"
 
 using net::FileStream;
 
 namespace content {
 
 bool ParseDownloadMetadata(const base::string16& metadata,
                            base::string16* mime_type,
                            base::FilePath* file_name,
                            GURL* url) {
-  const char16 separator = L':';
+  const base::char16 separator = L':';
 
   size_t mime_type_end_pos = metadata.find(separator);
   if (mime_type_end_pos == base::string16::npos)
     return false;
 
   size_t file_name_end_pos = metadata.find(separator, mime_type_end_pos + 1);
   if (file_name_end_pos == base::string16::npos)
     return false;
 
   GURL parsed_url = GURL(metadata.substr(file_name_end_pos + 1));
@@ skipping 72 matching lines @@
 }
 
 PromiseFileFinalizer::~PromiseFileFinalizer() {}
 
 void PromiseFileFinalizer::Cleanup() {
   if (drag_file_downloader_.get())
     drag_file_downloader_ = NULL;
 }
 
 }  // namespace content