Mus: Implement GpuMain mojo interface

services/ui/gpu/gpu_main.h

Index: services/ui/gpu/gpu_main.h
diff --git a/services/ui/gpu/gpu_main.h b/services/ui/gpu/gpu_main.h
index b1dde2b2bc92369c8902e4e578b6c5d4ffd759b0..fd82f3db56ed958e7f877895ffe87eab49c3f147 100644
--- a/services/ui/gpu/gpu_main.h
+++ b/services/ui/gpu/gpu_main.h
@@ -6,18 +6,23 @@
 #define SERVICES_UI_GPU_GPU_MAIN_H_
 
 #include "base/threading/thread.h"
+#include "gpu/ipc/in_process_command_buffer.h"
 #include "gpu/ipc/service/gpu_init.h"
 #include "services/ui/gpu/interfaces/gpu_service_internal.mojom.h"
+#include "services/ui/surfaces/display_compositor_factory.h"
+#include "services/ui/surfaces/display_compositor_factory_delegate.h"
 
 namespace gpu {
 class GpuMemoryBufferFactory;
+class ImageFactory;
 }
 
 namespace ui {
 
 class GpuServiceInternal;
 
-class GpuMain : public gpu::GpuSandboxHelper {
+class GpuMain : public gpu::GpuSandboxHelper,
+                public DisplayCompositorFactoryDelegate {
  public:
   GpuMain();
   ~GpuMain() override;
@@ -25,12 +30,18 @@ class GpuMain : public gpu::GpuSandboxHelper {
   void OnStart();
   void Create(mojom::GpuServiceInternalRequest request);
 
+  void Create(cc::mojom::DisplayCompositorFactoryRequest request);
+
   GpuServiceInternal* gpu_service() { return gpu_service_internal_.get(); }
 
  private:
   void InitOnGpuThread(
       scoped_refptr<base::SingleThreadTaskRunner> io_runner,
       scoped_refptr<base::SingleThreadTaskRunner> compositor_runner);
+  void InitOnCompositorThread(
+      gpu::ImageFactory* image_factory,
+      scoped_refptr<base::SingleThreadTaskRunner> compositor_runner,
+      cc::mojom::DisplayCompositorFactoryRequest request);
 
   void TearDownOnCompositorThread();
   void TearDownOnGpuThread();
@@ -41,8 +52,22 @@ class GpuMain : public gpu::GpuSandboxHelper {
   bool EnsureSandboxInitialized(
       gpu::GpuWatchdogThread* watchdog_thread) override;
 
+  // DisplayCompositorFactoryDelegate implementation:
+  std::unique_ptr<gpu::GpuMemoryBufferManager> CreateGpuMemoryBufferManager()
+      override;
+
   std::unique_ptr<gpu::GpuInit> gpu_init_;
   std::unique_ptr<GpuServiceInternal> gpu_service_internal_;
+
+  // The message-pipe used by the DisplayCompositor to request gpu memory
+  // buffers.
+  mojom::GpuServiceInternalPtr gpu_internal_;
+
+  // The InCommandCommandBuffer::Service used by the display compositor.
+  scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_command_service_;
+
+  std::unique_ptr<DisplayCompositorFactory> display_compositor_factory_;
+
   std::unique_ptr<gpu::GpuMemoryBufferFactory> gpu_memory_buffer_factory_;
 
   // The main thread for GpuService.