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

dbus/string_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 "dbus/string_util.h"
 
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 
 namespace dbus {
 
 bool IsValidObjectPath(const std::string& value) {
   // This implementation is based upon D-Bus Specification Version 0.19.
 
   const bool kCaseSensitive = true;
 
   // A valid object path begins with '/'.
   if (!StartsWithASCII(value, "/", kCaseSensitive))
@@ skipping 21 matching lines @@
   }
 
   // A trailing '/' character is not allowed unless the path is the root path.
   if (value.size() > 1 && EndsWith(value, "/", kCaseSensitive))
     return false;
 
   return true;
 }
 
 }  // namespace dbus