Add support to the UI Service to run it inside the browser's process.

services/ui/ws/window_server.h

Index: services/ui/ws/window_server.h
diff --git a/services/ui/ws/window_server.h b/services/ui/ws/window_server.h
index 090948a2a5f43f98198c51e005001dcef3320dc9..32aeb61742ea1b5de303190439b7d181675595e6 100644
--- a/services/ui/ws/window_server.h
+++ b/services/ui/ws/window_server.h
@@ -36,6 +36,7 @@ class Display;
 class DisplayManager;
 class GpuHost;
 class ServerWindow;
+class ThreadedImageCursorsFactory;
 class UserActivityMonitor;
 class WindowManagerState;
 class WindowServerDelegate;
@@ -81,6 +82,8 @@ class WindowServer : public ServerWindowDelegate,
 
   void SetGpuHost(std::unique_ptr<GpuHost> gpu_host);
 
+  ThreadedImageCursorsFactory* GetThreadedImageCursorsFactory();
+
   // Creates a new ServerWindow. The return value is owned by the caller, but
   // must be destroyed before WindowServer.
   ServerWindow* CreateServerWindow(