Use a direct include of strings headers in remoting/.

remoting/base/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 "remoting/base/util.h"
 
 #include <math.h>
 
 #include "base/logging.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "base/time.h"
 #include "media/base/video_frame.h"
 #include "media/base/yuv_convert.h"
 #include "third_party/libyuv/include/libyuv/convert.h"
 #include "third_party/skia/include/core/SkRegion.h"
 
 #if defined(OS_POSIX)
 #include <pwd.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ skipping 299 matching lines @@
   getpwuid_r(getuid(), &passwd, buf.get(), buf_size, &passwd_result);
   if (!passwd_result)
     return std::string();
   return std::string(passwd_result->pw_name);
 #else  // !defined(OS_POSIX)
   return std::string();
 #endif  // defined(OS_POSIX)
 }
 
 }  // namespace remoting