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

chrome/browser/chromeos/drive/logging.cc

 // Copyright (c) 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/logging.h"
 
 #include "base/lazy_instance.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "chrome/browser/google_apis/event_logger.h"
 
 namespace drive {
 namespace util {
 namespace {
 
 static base::LazyInstance<google_apis::EventLogger> g_logger =
     LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
@@ skipping 12 matching lines @@
   ptr->Log("%s", what.c_str());
 }
 
 std::vector<google_apis::EventLogger::Event> GetLogHistory() {
   google_apis::EventLogger* ptr = g_logger.Pointer();
   return ptr->GetHistory();
 }
 
 }  // namespace util
 }  // namespace drive