Use a direct include of strings headers in chrome/browser/chromeos/.

chrome/browser/chromeos/drive/job_list.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 "chrome/browser/chromeos/drive/job_list.h"
 
 #include "base/logging.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/stringprintf.h"
 
 namespace drive {
 
 std::string JobTypeToString(JobType type) {
   switch (type){
     case TYPE_GET_ABOUT_RESOURCE:
       return "TYPE_GET_ABOUT_RESOURCE";
     case TYPE_GET_APP_LIST:
       return "TYPE_GET_APP_LIST";
     case TYPE_GET_ALL_RESOURCE_LIST:
@@ skipping 108 matching lines @@
     case TYPE_DOWNLOAD_FILE:
     case TYPE_UPLOAD_NEW_FILE:
     case TYPE_UPLOAD_EXISTING_FILE:
       break;
   }
 
   return true;
 }
 
 }  // namespace drive