Add PlatformScreenDelegate and start implementation.

services/ui/service.h

Index: services/ui/service.h
diff --git a/services/ui/service.h b/services/ui/service.h
index b26e4b521a42a284f5f03a77b8ecc1e9b1d50530..a0fb21a33c28f233f4269fdc0981e1c403cc56fc 100644
--- a/services/ui/service.h
+++ b/services/ui/service.h
@@ -13,7 +13,6 @@
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/weak_ptr.h"
 #include "services/shell/public/cpp/interface_factory.h"
 #include "services/shell/public/cpp/service.h"
 #include "services/shell/public/cpp/service_runner.h"
@@ -109,6 +108,7 @@ class Service
   void OnNoMoreDisplays() override;
   bool IsTestConfig() const override;
   void CreateDefaultDisplays() override;
+  void UpdateTouchTransforms() override;
 
   // shell::InterfaceFactory<mojom::AccessibilityManager> implementation.
   void Create(const shell::Identity& remote_identity,
@@ -159,13 +159,6 @@ class Service
   void Create(const shell::Identity& remote_identity,
               mojom::WindowServerTestRequest request) override;
 
-  // Callback for display configuration. |id| is the identifying token for the
-  // configured display that will identify a specific physical display across
-  // configuration changes. |bounds| is the bounds of the display in screen
-  // coordinates.
-  void OnCreatedPhysicalDisplay(int64_t id, const gfx::Rect& bounds);
-
-  ws::PlatformDisplayInitParams platform_display_init_params_;
   std::unique_ptr<ws::WindowServer> window_server_;
   std::unique_ptr<ui::PlatformEventSource> event_source_;
   tracing::Provider tracing_;
@@ -187,8 +180,6 @@ class Service
   IMERegistrarImpl ime_registrar_;
   IMEServerImpl ime_server_;
 
-  base::WeakPtrFactory<Service> weak_ptr_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(Service);
 };