Simplify message parsing.

remoting/protocol/host_event_dispatcher.h

Index: remoting/protocol/host_event_dispatcher.h
diff --git a/remoting/protocol/host_event_dispatcher.h b/remoting/protocol/host_event_dispatcher.h
index 9a6211a2beb9a787c32d23a504a8f5f86309fdfd..e299c2cfb173dd848e453dc748330d33ac43388f 100644
--- a/remoting/protocol/host_event_dispatcher.h
+++ b/remoting/protocol/host_event_dispatcher.h
@@ -9,7 +9,6 @@
 
 #include "base/macros.h"
 #include "remoting/protocol/channel_dispatcher_base.h"
-#include "remoting/protocol/protobuf_message_parser.h"
 
 namespace remoting {
 namespace protocol {
@@ -38,13 +37,11 @@ class HostEventDispatcher : public ChannelDispatcherBase {
   }
 
  private:
-  void OnMessageReceived(scoped_ptr<EventMessage> message);
+  void OnIncomingMessage(scoped_ptr<CompoundBuffer> buffer) override;
 
-  InputStub* input_stub_;
+  InputStub* input_stub_ = nullptr;
   OnInputEventCallback on_input_event_callback_;
 
-  ProtobufMessageParser<EventMessage> parser_;
-
   DISALLOW_COPY_AND_ASSIGN(HostEventDispatcher);
 };