Use base namespace for string16 in components and cloud_print.

cloud_print/service/win/chrome_launcher.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 "cloud_print/service/win/chrome_launcher.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 141 matching lines @@
   base::JSONWriter::WriteWithOptions(dictionary,
                                      base::JSONWriter::OPTIONS_PRETTY_PRINT,
                                      &result);
   return result;
 }
 
 void DeleteAutorunKeys(const base::FilePath& user_data_dir) {
   base::win::RegKey key(HKEY_CURRENT_USER, kAutoRunKeyPath, KEY_SET_VALUE);
   if (!key.Valid())
     return;
-  std::vector<string16> to_delete;
+  std::vector<base::string16> to_delete;
 
   base::FilePath abs_user_data_dir = base::MakeAbsoluteFilePath(user_data_dir);
 
   {
     base::win::RegistryValueIterator value(HKEY_CURRENT_USER, kAutoRunKeyPath);
     for (; value.Valid(); ++value) {
       if (value.Type() == REG_SZ && value.Value()) {
         CommandLine cmd = CommandLine::FromString(value.Value());
         if (cmd.GetSwitchValueASCII(switches::kProcessType) ==
             switches::kServiceProcess &&
@@ skipping 165 matching lines @@
       }
     } else {
       LOG(ERROR) << "Chrome launch failed.";
       return result;
     }
   }
   NOTREACHED();
   return std::string();
 }