Use a direct include of strings headers in remoting/.

remoting/base/capabilities.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 "remoting/base/capabilities.h"
 
 #include <algorithm>
 #include <vector>
 
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 
 namespace remoting {
 
 bool HasCapability(const std::string& capabilities, const std::string& key) {
   std::vector<std::string> caps;
   Tokenize(capabilities, " ", &caps);
   return std::find(caps.begin(), caps.end(), key) != caps.end();
 }
 
 std::string IntersectCapabilities(const std::string& client_capabilities,
@@ skipping 14 matching lines @@
                             host_caps.begin(),
                             host_caps.end(),
                             result.begin());
   if (end != result.end())
     result.erase(end, result.end());
 
   return JoinString(result, " ");
 }
 
 }  // namespace remoting