Dart: Removes need to call listen().

mojo/public/dart/src/codec.dart

 // 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.
 
 part of bindings;
 
 int align(int size) => size + (kAlignment - (size % kAlignment)) % kAlignment;
 
 const int kAlignment = 8;
 const int kSerializedHandleSize = 4;
@@ skipping 192 matching lines @@
   void encodeInterface(
       core.MojoEventStreamListener interface, int offset, bool nullable) {
     if (interface == null) {
       encodeInvalideHandle(offset, nullable);
       return;
     }
     if (interface is Stub) {
       assert(!interface.isBound);
       var pipe = new core.MojoMessagePipe();
       interface.bind(pipe.endpoints[0]);
+      interface.listen();
       encodeMessagePipeHandle(pipe.endpoints[1], offset, nullable);
     } else if (interface is Proxy) {
       assert(interface.isBound);
       if (!interface.isOpen) {
         // Make sure that we are listening so that state for the proxy is
         // cleaned up when the message is sent and the handle is closed.
         interface.listen();
       }
       encodeMessagePipeHandle(interface.endpoint, offset, nullable);
     } else {
       throw new MojoCodecError(
           'Trying to encode an unknown MojoEventStreamListener');
     }
   }
 
   void encodeInterfaceRequest(ProxyBase client, int offset, bool nullable) {
     if (client == null) {
       encodeInvalideHandle(offset, nullable);
       return;
     }
     var pipe = new core.MojoMessagePipe();
     client.impl.bind(pipe.endpoints[0]);
+    client.impl.listen();
     encodeMessagePipeHandle(pipe.endpoints[1], offset, nullable);
   }
 
   void encodeNullPointer(int offset, bool nullable) {
     if (!nullable) {
       throw new MojoCodecError(
           'Trying to encode a null pointer for a non-nullable type');
     }
     _buffer.buffer.setUint64(_base + offset, 0, Endianness.LITTLE_ENDIAN);
   }
@@ skipping 577 matching lines @@
       throw new MojoCodecError(
           'Incorrect header for map. The size is incorrect.');
     }
     if (header.version != kMapStructHeader.version) {
       throw new MojoCodecError(
           'Incorrect header for map. The version is incorrect.');
     }
     return header;
   }
 }