Use a direct include of strings headers in rlz/, sandbox/, skia/, sql/, sync/.

sync/engine/net/server_connection_manager.h

 // Copyright 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.
 
 #ifndef SYNC_ENGINE_NET_SERVER_CONNECTION_MANAGER_H_
 #define SYNC_ENGINE_NET_SERVER_CONNECTION_MANAGER_H_
 
 #include <iosfwd>
 #include <string>
 
 #include "base/atomicops.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/threading/thread_checker.h"
 #include "sync/base/sync_export.h"
 #include "sync/syncable/syncable_id.h"
 
 namespace sync_pb {
 class ClientToServerMessage;
 }
 
@@ skipping 317 matching lines @@
   void NotifyStatusChanged();
 
   DISALLOW_COPY_AND_ASSIGN(ServerConnectionManager);
 };
 
 std::ostream& operator<<(std::ostream& s, const struct HttpResponse& hr);
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_NET_SERVER_CONNECTION_MANAGER_H_