Revert "Delete the Surfaces service."

services/surfaces/context_provider_mojo.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/surfaces/context_provider_mojo.h"
+
+#include "base/logging.h"
+#include "mojo/gpu/mojo_context_support.h"
+#include "mojo/gpu/mojo_gles2_impl_autogen.h"
+#include "mojo/public/cpp/environment/environment.h"
+
+namespace mojo {
+
+ContextProviderMojo::ContextProviderMojo(
+    ScopedMessagePipeHandle command_buffer_handle)
+    : command_buffer_handle_(command_buffer_handle.Pass()),
+      context_(nullptr),
+      context_lost_(false) {
+}
+
+bool ContextProviderMojo::BindToCurrentThread() {
+  DCHECK(command_buffer_handle_.is_valid());
+  context_ = MGLCreateContext(MGL_API_VERSION_GLES2,
+                              command_buffer_handle_.release().value(),
+                              MGL_NO_CONTEXT, &ContextLostThunk, this,
+                              Environment::GetDefaultAsyncWaiter());
+  DCHECK(context_);
+  context_support_.reset(new MojoContextSupport(context_));
+  gles2_impl_.reset(new MojoGLES2Impl(context_));
+  return !!context_;
+}
+
+gpu::gles2::GLES2Interface* ContextProviderMojo::ContextGL() {
+  return gles2_impl_.get();
+}
+
+gpu::ContextSupport* ContextProviderMojo::ContextSupport() {
+  return context_support_.get();
+}
+
+class GrContext* ContextProviderMojo::GrContext() {
+  return NULL;
+}
+
+cc::ContextProvider::Capabilities ContextProviderMojo::ContextCapabilities() {
+  return capabilities_;
+}
+
+void ContextProviderMojo::SetupLock() {
+}
+
+base::Lock* ContextProviderMojo::GetLock() {
+  return &context_lock_;
+}
+
+bool ContextProviderMojo::IsContextLost() {
+  return context_lost_;
+}
+bool ContextProviderMojo::DestroyedOnMainThread() {
+  return !context_;
+}
+
+void ContextProviderMojo::SetLostContextCallback(
+    const LostContextCallback& lost_context_callback) {
+  lost_context_callback_ = lost_context_callback;
+}
+
+ContextProviderMojo::~ContextProviderMojo() {
+  if (context_)
+    MGLDestroyContext(context_);
+}
+
+void ContextProviderMojo::ContextLost() {
+  context_lost_ = true;
+  if (!lost_context_callback_.is_null())
+    lost_context_callback_.Run();
+}
+
+}  // namespace mojo