Revert "Delete the Surfaces service."

services/surfaces/context_provider_mojo.h

+// 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.
+
+#ifndef SERVICES_SURFACES_CONTEXT_PROVIDER_MOJO_H_
+#define SERVICES_SURFACES_CONTEXT_PROVIDER_MOJO_H_
+
+#include <MGL/mgl.h>
+
+#include "base/macros.h"
+#include "base/synchronization/lock.h"
+#include "cc/output/context_provider.h"
+#include "gpu/command_buffer/client/gles2_interface.h"
+#include "mojo/gpu/mojo_context_support.h"
+#include "mojo/public/cpp/system/core.h"
+
+namespace mojo {
+
+class MojoContextSupport;
+class MojoGLES2Impl;
+
+class ContextProviderMojo : public cc::ContextProvider {
+ public:
+  explicit ContextProviderMojo(ScopedMessagePipeHandle command_buffer_handle);
+
+  // cc::ContextProvider implementation.
+  bool BindToCurrentThread() override;
+  gpu::gles2::GLES2Interface* ContextGL() override;
+  gpu::ContextSupport* ContextSupport() override;
+  class GrContext* GrContext() override;
+  Capabilities ContextCapabilities() override;
+  bool IsContextLost() override;
+  void VerifyContexts() override {}
+  void DeleteCachedResources() override {}
+  bool DestroyedOnMainThread() override;
+  void SetLostContextCallback(
+      const LostContextCallback& lost_context_callback) override;
+  void SetMemoryPolicyChangedCallback(
+      const MemoryPolicyChangedCallback& memory_policy_changed_callback)
+      override {}
+  void SetupLock() override;
+  base::Lock* GetLock() override;
+
+ protected:
+  friend class base::RefCountedThreadSafe<ContextProviderMojo>;
+  ~ContextProviderMojo() override;
+
+ private:
+  static void ContextLostThunk(void* closure) {
+    static_cast<ContextProviderMojo*>(closure)->ContextLost();
+  }
+  void ContextLost();
+
+  cc::ContextProvider::Capabilities capabilities_;
+  ScopedMessagePipeHandle command_buffer_handle_;
+  MGLContext context_;
+  scoped_ptr<MojoGLES2Impl> gles2_impl_;
+  scoped_ptr<MojoContextSupport> context_support_;
+  bool context_lost_;
+  LostContextCallback lost_context_callback_;
+
+  base::Lock context_lock_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContextProviderMojo);
+};
+
+}  // namespace mojo
+
+#endif  // SERVICES_SURFACES_CONTEXT_PROVIDER_MOJO_H_