mus: Use ui::ContextProviderCommandBuffer.

services/ui/public/cpp/context_provider.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/public/cpp/context_provider.h"
-
-#include <stdint.h>
-
-#include "base/logging.h"
-#include "cc/output/context_cache_controller.h"
-#include "gpu/ipc/client/gpu_channel_host.h"
-#include "services/ui/public/cpp/gles2_context.h"
-
-namespace ui {
-
-ContextProvider::ContextProvider(
-    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host)
-    : gpu_channel_host_(std::move(gpu_channel_host)) {}
-
-bool ContextProvider::BindToCurrentThread() {
-  context_ = GLES2Context::CreateOffscreenContext(
-      gpu_channel_host_, base::ThreadTaskRunnerHandle::Get());
-  if (context_) {
-    cache_controller_.reset(new cc::ContextCacheController(
-        context_->context_support(), base::ThreadTaskRunnerHandle::Get()));
-  }
-  return !!context_;
-}
-
-gpu::gles2::GLES2Interface* ContextProvider::ContextGL() {
-  return context_->interface();
-}
-
-gpu::ContextSupport* ContextProvider::ContextSupport() {
-  if (!context_)
-    return NULL;
-  return context_->context_support();
-}
-
-class GrContext* ContextProvider::GrContext() {
-  return NULL;
-}
-
-cc::ContextCacheController* ContextProvider::CacheController() {
-  return cache_controller_.get();
-}
-
-void ContextProvider::InvalidateGrContext(uint32_t state) {}
-
-gpu::Capabilities ContextProvider::ContextCapabilities() {
-  return gpu::Capabilities();
-}
-
-base::Lock* ContextProvider::GetLock() {
-  // This context provider is not used on multiple threads.
-  NOTREACHED();
-  return nullptr;
-}
-
-ContextProvider::~ContextProvider() {
-}
-
-}  // namespace ui