Move DisplayCompositor code to new component.

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 787728af207e9701ca62289d9acb43ced51f06f6..d38c3a9608df714c7892d07314a6bd54aa5cd8f8 100644
--- a/services/ui/gpu/gpu_main.h
+++ b/services/ui/gpu/gpu_main.h
@@ -6,11 +6,11 @@
 #define SERVICES_UI_GPU_GPU_MAIN_H_
 
 #include "base/threading/thread.h"
+#include "components/frame_sinks/display_compositor.h"
 #include "gpu/ipc/in_process_command_buffer.h"
 #include "gpu/ipc/service/gpu_init.h"
 #include "services/ui/gpu/interfaces/gpu_main.mojom.h"
 #include "services/ui/gpu/interfaces/gpu_service.mojom.h"
-#include "services/ui/surfaces/display_compositor.h"
 
 namespace gpu {
 class GpuMemoryBufferFactory;
@@ -82,7 +82,7 @@ class GpuMain : public gpu::GpuSandboxHelper, public mojom::GpuMain {
   cc::mojom::DisplayCompositorClientPtrInfo
       pending_display_compositor_client_info_;
 
-  std::unique_ptr<DisplayCompositor> display_compositor_;
+  std::unique_ptr<frame_sinks::DisplayCompositor> display_compositor_;
 
   std::unique_ptr<gpu::GpuMemoryBufferFactory> gpu_memory_buffer_factory_;