Rename ViewManagerService,ViewManagerClient -> ViewTree,ViewTreeClient

components/view_manager/view_manager_root_impl.h

Index: components/view_manager/view_manager_root_impl.h
diff --git a/components/view_manager/view_manager_root_impl.h b/components/view_manager/view_manager_root_impl.h
index f9e6a9b9e446e577e1a5c51fbce03db168b1f6ed..896971acf1e086a748ecefc0ae25ec9bab936878 100644
--- a/components/view_manager/view_manager_root_impl.h
+++ b/components/view_manager/view_manager_root_impl.h
@@ -23,7 +23,7 @@ namespace view_manager {
 
 class ConnectionManager;
 class ViewManagerRootDelegate;
-class ViewManagerServiceImpl;
+class ViewTreeImpl;
 
 // ViewManagerRootImpl is an implementation of the ViewManagerRoot interface.
 // It serves as a top level root view for a window. Its lifetime is managed by
@@ -47,7 +47,7 @@ class ViewManagerRootImpl : public DisplayManagerDelegate,
   // Initializes state that depends on the existence of a ViewManagerRootImpl.
   void Init(ViewManagerRootDelegate* delegate);
 
-  ViewManagerServiceImpl* GetViewManagerService();
+  ViewTreeImpl* GetViewTree();
 
   mojo::ViewManagerRootClient* client() const { return client_.get(); }