Use a direct include of strings headers in crypto/, dbus/, device/.

device/bluetooth/bluetooth_utils.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 "device/bluetooth/bluetooth_utils.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 
 namespace {
 static const char* kCommonUuidPostfix = "-0000-1000-8000-00805f9b34fb";
 static const char* kCommonUuidPrefix = "0000";
 static const int kUuidSize = 36;
 }  // namespace
 
 namespace device {
 namespace bluetooth_utils {
 
@@ skipping 28 matching lines @@
       if (!IsHexDigit(uuid[i]))
         return std::string();
       uuid_result[i] = tolower(uuid[i]);
     }
   }
   return uuid_result;
 }
 
 }  // namespace bluetooth_utils
 }  // namespace device