Add base:: to string16s in chrome/.

chrome/service/cloud_print/print_system_xps_win.cc

 // Copyright 2013 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 "base/file_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/object_watcher.h"
 #include "base/win/scoped_bstr.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/scoped_hdc.h"
@@ skipping 157 matching lines @@
 
         HDC dc = CreateDC(L"WINSPOOL", UTF8ToWide(printer_name).c_str(),
                           NULL, pt_dev_mode.dm_);
         if (!dc) {
           NOTREACHED();
           return false;
         }
         hr = E_FAIL;
         DOCINFO di = {0};
         di.cbSize = sizeof(DOCINFO);
-        string16 doc_name = UTF8ToUTF16(job_title);
+        base::string16 doc_name = UTF8ToUTF16(job_title);
         DCHECK(printing::SimplifyDocumentTitle(doc_name) == doc_name);
         di.lpszDocName = doc_name.c_str();
         job_id_ = StartDoc(dc, &di);
         if (job_id_ <= 0)
           return false;
 
         printer_dc_.Set(dc);
         saved_dc_ = SaveDC(printer_dc_.Get());
         print_data_file_path_ = print_data_file_path;
         delegate_ = delegate;
@@ skipping 388 matching lines @@
 }
 
 }  // namespace
 
 scoped_refptr<PrintSystem> PrintSystem::CreateInstance(
     const base::DictionaryValue* print_system_settings) {
   return new PrintSystemWinXPS;
 }
 
 }  // namespace cloud_print