Change FilterChain::Append() to a template method.

mojo/public/cpp/bindings/sync_dispatcher.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_SYNC_DISPATCHER_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_SYNC_DISPATCHER_H_
 
 #include "mojo/public/cpp/bindings/lib/filter_chain.h"
 #include "mojo/public/cpp/bindings/lib/message_header_validator.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
 
 class MessageReceiver;
 
 // Waits for one message to arrive on the message pipe, and dispatch it to the
 // receiver. Returns true on success, false on failure.
 //
 // NOTE: The message hasn't been validated and may be malformed!
 bool WaitForMessageAndDispatch(MessagePipeHandle handle,
                                mojo::MessageReceiver* receiver);
 
 template<typename Interface> class SyncDispatcher {
  public:
   SyncDispatcher(ScopedMessagePipeHandle message_pipe, Interface* sink)
       : message_pipe_(message_pipe.Pass()) {
     stub_.set_sink(sink);
 
-    filters_.Append(new internal::MessageHeaderValidator)
-            .Append(new typename Interface::RequestValidator_);
-    filters_.set_sink(&stub_);
+    filters_.Append<internal::MessageHeaderValidator>();
+    filters_.Append<typename Interface::RequestValidator_>();
+    filters_.SetSink(&stub_);
   }
 
   bool WaitAndDispatchOneMessage() {
     return WaitForMessageAndDispatch(message_pipe_.get(),
                                      filters_.GetHead());
   }
 
  private:
   ScopedMessagePipeHandle message_pipe_;
   typename Interface::Stub_ stub_;
   internal::FilterChain filters_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_SYNC_DISPATCHER_H_