Remove some InterfacePtr<> methods which directly deal with message pipe handles.

examples/surfaces_app/child_gl_impl.cc

 // 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.
 
 #include "examples/surfaces_app/child_gl_impl.h"
 
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES
 #endif
 
@@ skipping 41 matching lines @@
       start_time_(base::TimeTicks::Now()),
       next_resource_id_(1),
       returner_binding_(this),
       binding_(this, request.Pass()) {
   surfaces_service_connection->ConnectToService(&surface_);
   surface_->GetIdNamespace(
       base::Bind(&ChildGLImpl::SetIdNamespace, base::Unretained(this)));
   ResourceReturnerPtr returner_ptr;
   returner_binding_.Bind(GetProxy(&returner_ptr));
   surface_->SetResourceReturner(returner_ptr.Pass());
-  context_ =
-      MojoGLES2CreateContext(command_buffer.PassMessagePipe().release().value(),
-                             &ContextLostThunk,
-                             this,
-                             Environment::GetDefaultAsyncWaiter());
+  context_ = MojoGLES2CreateContext(
+      command_buffer.PassInterface().PassHandle().release().value(),
+      &ContextLostThunk, this, Environment::GetDefaultAsyncWaiter());
   DCHECK(context_);
   MojoGLES2MakeCurrent(context_);
 }
 
 ChildGLImpl::~ChildGLImpl() {
   MojoGLES2DestroyContext(context_);
   surface_->DestroySurface(local_id_);
 }
 
 void ChildGLImpl::ProduceFrame(ColorPtr color,
@@ skipping 122 matching lines @@
   surface_->SubmitFrame(local_id_, mojo::Frame::From(*frame), mojo::Closure());
 
   base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&ChildGLImpl::Draw, base::Unretained(this)),
       base::TimeDelta::FromMilliseconds(50));
 }
 
 }  // namespace examples
 }  // namespace mojo