Revert of ash/mash: Add a mus-client that sets up ash to provide the system ui for mash.

ash/mus/stub_context_factory.h

-// Copyright 2016 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 ASH_MUS_STUB_CONTEXT_FACTORY_H_
-#define ASH_MUS_STUB_CONTEXT_FACTORY_H_
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/compositor/compositor.h"
-
-namespace cc {
-class SingleThreadTaskGraphRunner;
-}
-
-namespace ash {
-namespace sysui {
-
-class StubContextFactory : public ui::ContextFactory {
- public:
-  StubContextFactory();
-  ~StubContextFactory() override;
-
- private:
-  // ui::ContextFactory implementation.
-  void CreateOutputSurface(base::WeakPtr<ui::Compositor> compositor) override;
-  scoped_ptr<ui::Reflector> CreateReflector(
-      ui::Compositor* mirrored_compositor,
-      ui::Layer* mirroring_layer) override;
-  void RemoveReflector(ui::Reflector* reflector) override;
-  scoped_refptr<cc::ContextProvider> SharedMainThreadContextProvider() override;
-  void RemoveCompositor(ui::Compositor* compositor) override;
-  bool DoesCreateTestContexts() override;
-  uint32_t GetImageTextureTarget(gfx::BufferFormat format,
-                                 gfx::BufferUsage usage) override;
-  cc::SharedBitmapManager* GetSharedBitmapManager() override;
-  gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
-  cc::TaskGraphRunner* GetTaskGraphRunner() override;
-  scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator() override;
-  void ResizeDisplay(ui::Compositor* compositor,
-                     const gfx::Size& size) override;
-
-  uint32_t next_surface_id_namespace_;
-  scoped_ptr<cc::SingleThreadTaskGraphRunner> task_graph_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(StubContextFactory);
-};
-
-}  // namespace sysui
-}  // namespace ash
-
-#endif  // ASH_MUS_STUB_CONTEXT_FACTORY_H_