Add a Display and ContextProvider concept to mojom, use to recreate

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 60 matching lines @@
 ChildGLImpl::~ChildGLImpl() {
   MojoGLES2DestroyContext(context_);
   surface_->DestroySurface(local_id_);
 }
 
 void ChildGLImpl::ProduceFrame(ColorPtr color,
                                SizePtr size,
                                const ProduceCallback& callback) {
   color_ = color.To<SkColor>();
   size_ = size.To<gfx::Size>();
-  cube_.Init(size_.width(), size_.height());
+  cube_.Init();
+  cube_.set_size(size_.width(), size_.height());
   cube_.set_color(
       SkColorGetR(color_), SkColorGetG(color_), SkColorGetB(color_));
   surface_->CreateSurface(local_id_);
   produce_callback_ = callback;
   if (id_namespace_ != 0u)
     RunProduceCallback();
   Draw();
 }
 
 void ChildGLImpl::SetIdNamespace(uint32_t id_namespace) {
@@ skipping 106 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