Moves Create() off of View and onto ViewManager

mojo/services/view_manager/public/cpp/view_manager.h

Index: mojo/services/view_manager/public/cpp/view_manager.h
diff --git a/mojo/services/view_manager/public/cpp/view_manager.h b/mojo/services/view_manager/public/cpp/view_manager.h
index 7d989f22d702f140dea1f2bb927fc6557bd3a17f..3766c9f96a8ca85f296c5fc7479968eedc56a6ab 100644
--- a/mojo/services/view_manager/public/cpp/view_manager.h
+++ b/mojo/services/view_manager/public/cpp/view_manager.h
@@ -29,6 +29,10 @@ class ViewManager {
   // focused.
   virtual View* GetFocusedView() = 0;
 
+  // Creates and returns a new View (which is owned by the ViewManager). Views
+  // are initially hidden, use SetVisible(true) to show.
+  virtual View* CreateView() = 0;
+
  protected:
   virtual ~ViewManager() {}
 };