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

examples/surfaces_app/embedder.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/embedder.h"
 
 #include "cc/output/compositor_frame.h"
 #include "cc/output/delegated_frame_data.h"
 #include "cc/quads/render_pass.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/surface_draw_quad.h"
 #include "examples/surfaces_app/surfaces_util.h"
 #include "mojo/converters/surfaces/surfaces_type_converters.h"
 #include "mojo/services/surfaces/public/interfaces/surface_id.mojom.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/transform.h"
 
 namespace mojo {
 namespace examples {
 
 using cc::RenderPass;
 using cc::RenderPassId;
 using cc::SurfaceDrawQuad;
 using cc::DrawQuad;
 using cc::SolidColorDrawQuad;
 using cc::DelegatedFrameData;
 using cc::CompositorFrame;
 
-Embedder::Embedder(uint32_t local_id, Surface* surface)
-    : local_id_(local_id), surface_(surface) {
+Embedder::Embedder(Display* display)
+    : display_(display), frame_pending_(false) {
 }
 
 Embedder::~Embedder() {
 }
 
 void Embedder::ProduceFrame(cc::SurfaceId child_one,
                             cc::SurfaceId child_two,
                             const gfx::Size& child_size,
                             const gfx::Size& size,
                             int offset) {
+  DCHECK(!frame_pending_);
+
   gfx::Rect rect(size);
   RenderPassId pass_id(1, 1);
   scoped_ptr<RenderPass> pass = RenderPass::Create();
   pass->SetNew(pass_id, rect, rect, gfx::Transform());
 
   if (!child_one.is_null()) {
     gfx::Transform one_transform;
     one_transform.Translate(10 + child_size.width() / 2,
                             50 + child_size.height() / 2);
     one_transform.Translate(0, offset);
@@ skipping 31 matching lines @@
                      rect,
                      SK_ColorYELLOW,
                      force_anti_aliasing_off);
 
   scoped_ptr<DelegatedFrameData> delegated_frame_data(new DelegatedFrameData);
   delegated_frame_data->render_pass_list.push_back(pass.Pass());
 
   scoped_ptr<CompositorFrame> frame(new CompositorFrame);
   frame->delegated_frame_data = delegated_frame_data.Pass();
 
-  surface_->SubmitFrame(local_id_, mojo::Frame::From(*frame), mojo::Closure());
+  frame_pending_ = true;
+  display_->SubmitFrame(mojo::Frame::From(*frame),
+                        [this]() { frame_pending_ = false; });
 }
 
 }  // namespace examples
 }  // namespace mojo