Move more Mojo bindings helpers out of internal namespace

mojo/public/cpp/bindings/strong_binding.h

 // Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_STRONG_BINDING_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_STRONG_BINDING_H_
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/lib/filter_chain.h"
-#include "mojo/public/cpp/bindings/lib/message_header_validator.h"
 #include "mojo/public/cpp/bindings/lib/router.h"
+#include "mojo/public/cpp/bindings/message_header_validator.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
 
 // This connects an interface implementation strongly to a pipe. When a
 // connection error is detected the implementation is deleted. Deleting the
 // connector also closes the pipe.
 //
 // Example of an implementation that is always bound strongly to a pipe
 //
@@ skipping 87 matching lines @@
  private:
   base::Closure connection_error_handler_;
   Binding<Interface> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(StrongBinding);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_STRONG_BINDING_H_