Moves move logic into WM instead of WS

components/mus/ws/window_tree_host_impl.h

Index: components/mus/ws/window_tree_host_impl.h
diff --git a/components/mus/ws/window_tree_host_impl.h b/components/mus/ws/window_tree_host_impl.h
index 867d7378f8134b143a7b7da412aa4d26f0c1711b..73bf36d90440a87dea2e120e13141164e49b6513 100644
--- a/components/mus/ws/window_tree_host_impl.h
+++ b/components/mus/ws/window_tree_host_impl.h
@@ -87,7 +87,6 @@ class WindowTreeHostImpl : public DisplayManagerDelegate,
   void AddAccelerator(uint32_t id,
                       mojo::EventMatcherPtr event_matcher) override;
   void RemoveAccelerator(uint32_t id) override;
-  void EnableWindowDraggingForChildren(Id transport_window_id) override;
 
  private:
   void OnClientClosed();
@@ -110,6 +109,7 @@ class WindowTreeHostImpl : public DisplayManagerDelegate,
   void SetFocusedWindowFromEventDispatcher(ServerWindow* window) override;
   ServerWindow* GetFocusedWindowForEventDispatcher() override;
   void DispatchInputEventToWindow(ServerWindow* target,
+                                  bool in_nonclient_area,
                                   mojo::EventPtr event) override;
 
   WindowTreeHostDelegate* delegate_;