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

examples/bitmap_uploader/bitmap_uploader.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/bitmap_uploader/bitmap_uploader.h"
 
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES
 #endif  // GL_GLEXT_PROTOTYPES
 
@@ skipping 43 matching lines @@
   returner_binding_.Bind(GetProxy(&returner_ptr));
   surface_->SetResourceReturner(returner_ptr.Pass());
 
   ServiceProviderPtr gpu_service_provider;
   shell->ConnectToApplication("mojo:native_viewport_service",
                               GetProxy(&gpu_service_provider), nullptr);
   ConnectToService(gpu_service_provider.get(), &gpu_service_);
 
   CommandBufferPtr gles2_client;
   gpu_service_->CreateOffscreenGLES2Context(GetProxy(&gles2_client));
-  gles2_context_ =
-      MojoGLES2CreateContext(gles2_client.PassMessagePipe().release().value(),
-                             &LostContext,
-                             NULL,
-                             Environment::GetDefaultAsyncWaiter());
+  gles2_context_ = MojoGLES2CreateContext(
+      gles2_client.PassInterface().PassHandle().release().value(),
+      &LostContext, NULL, Environment::GetDefaultAsyncWaiter());
   MojoGLES2MakeCurrent(gles2_context_);
 }
 
 BitmapUploader::~BitmapUploader() {
   MojoGLES2DestroyContext(gles2_context_);
 }
 
 void BitmapUploader::SetColor(uint32_t color) {
   if (color_ == color)
     return;
@@ skipping 188 matching lines @@
                0);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   return texture;
 }
 
 uint32_t BitmapUploader::TextureFormat() {
   return format_ == BGRA ? GL_BGRA_EXT : GL_RGBA;
 }
 
 }  // namespace mojo