Introduce Display Compositor mojo interface. Use InProcessContextProvider.

services/ui/surfaces/direct_output_surface.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 "services/ui/surfaces/direct_output_surface.h"
 
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/output_surface_frame.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 
 namespace ui {
 
 DirectOutputSurface::DirectOutputSurface(
-    scoped_refptr<SurfacesContextProvider> context_provider,
+    scoped_refptr<cc::InProcessContextProvider> context_provider,
     cc::SyntheticBeginFrameSource* synthetic_begin_frame_source)
     : cc::OutputSurface(context_provider),
       synthetic_begin_frame_source_(synthetic_begin_frame_source),
       weak_ptr_factory_(this) {
   capabilities_.flipped_output_surface =
       context_provider->ContextCapabilities().flips_vertically;
-  context_provider->SetDelegate(this);
 }
 
 DirectOutputSurface::~DirectOutputSurface() {}
 
 void DirectOutputSurface::BindToClient(cc::OutputSurfaceClient* client) {
   DCHECK(client);
   DCHECK(!client_);
   client_ = client;
 }
 
@@ skipping 31 matching lines @@
   gpu::SyncToken sync_token;
   gl->GenUnverifiedSyncTokenCHROMIUM(fence_sync, sync_token.GetData());
 
   context_provider_->ContextSupport()->SignalSyncToken(
       sync_token, base::Bind(&DirectOutputSurface::OnSwapBuffersComplete,
                              weak_ptr_factory_.GetWeakPtr()));
 }
 
 uint32_t DirectOutputSurface::GetFramebufferCopyTextureFormat() {
   // TODO(danakj): What attributes are used for the default framebuffer here?
-  // Can it have alpha? SurfacesContextProvider doesn't take any attributes.
+  // Can it have alpha? cc::InProcessContextProvider doesn't take any

[rjkroege, 2016/11/22 18:26:26]

Purely informational comment: As danakj points out, this function does not
return the correct value on all platforms and for platforms other than
CrOS/Ozone, it would require adjustment. 

+  // attributes.
   return GL_RGB;
 }
 
 cc::OverlayCandidateValidator*
 DirectOutputSurface::GetOverlayCandidateValidator() const {
   return nullptr;
 }
 
 bool DirectOutputSurface::IsDisplayedAsOverlayPlane() const {
   return false;
@@ skipping 20 matching lines @@
   synthetic_begin_frame_source_->OnUpdateVSyncParameters(
       timebase,
       interval.is_zero() ? cc::BeginFrameArgs::DefaultInterval() : interval);
 }
 
 void DirectOutputSurface::OnSwapBuffersComplete() {
   client_->DidReceiveSwapBuffersAck();
 }
 
 }  // namespace ui