WIP: A couple of more ChannelMojo speedup ideas

third_party/mojo/src/mojo/edk/system/channel_endpoint.h

Index: third_party/mojo/src/mojo/edk/system/channel_endpoint.h
diff --git a/third_party/mojo/src/mojo/edk/system/channel_endpoint.h b/third_party/mojo/src/mojo/edk/system/channel_endpoint.h
index 90ee86b758399f912c93baac0d54b643e4d39036..170c21aed0c68459df305dff2d223a5a03c4b540 100644
--- a/third_party/mojo/src/mojo/edk/system/channel_endpoint.h
+++ b/third_party/mojo/src/mojo/edk/system/channel_endpoint.h
@@ -10,6 +10,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "mojo/edk/system/channel_endpoint_id.h"
+#include "mojo/edk/system/message_in_transit.h"
 #include "mojo/edk/system/message_in_transit_queue.h"
 #include "mojo/edk/system/system_impl_export.h"
 
@@ -18,7 +19,6 @@ namespace system {
 
 class Channel;
 class ChannelEndpointClient;
-class MessageInTransit;
 
 // TODO(vtl): The plan:
 //   - (Done.) Move |Channel::Endpoint| to |ChannelEndpoint|. Make it
@@ -153,7 +153,7 @@ class MOJO_SYSTEM_IMPL_EXPORT ChannelEndpoint
                     ChannelEndpointId remote_id);
 
   // Called when the |Channel| receives a message for the |ChannelEndpoint|.
-  void OnReadMessage(scoped_ptr<MessageInTransit> message);
+  void OnReadMessage(MessageInTransit::ReadContext& reading_message);
 
   // Called before the |Channel| gives up its reference to this object.
   void DetachFromChannel();