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

examples/spinning_cube/gles2_client_impl.cc

 // Copyright 2013 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/spinning_cube/gles2_client_impl.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <math.h>
 #include <stdlib.h>
@@ skipping 89 matching lines @@
     WantToDraw();
     break;
   }
   default:
     break;
   }
 }
 
 void GLES2ClientImpl::ContextCreated(mojo::CommandBufferPtr command_buffer) {
   context_ = MojoGLES2CreateContext(
-      command_buffer.PassMessagePipe().release().value(), &ContextLostThunk,
-      this, mojo::Environment::GetDefaultAsyncWaiter());
+      command_buffer.PassInterface().PassHandle().release().value(),
+      &ContextLostThunk, this, mojo::Environment::GetDefaultAsyncWaiter());
   MojoGLES2MakeCurrent(context_);
   cube_.Init();
   WantToDraw();
 }
 
 void GLES2ClientImpl::ContextLost() {
   cube_.OnGLContextLost();
   MojoGLES2DestroyContext(context_);
   context_ = nullptr;
   context_provider_->Create(nullptr,
@@ skipping 23 matching lines @@
   float delta = static_cast<float>(offset) / 1000000.;
   last_time_ = now;
   cube_.UpdateForTimeDelta(delta);
   cube_.Draw();
 
   MojoGLES2SwapBuffers();
   WantToDraw();
 }
 
 }  // namespace examples