Remove DispositionChangePhase.

mojo/services/public/cpp/view_manager/lib/view.cc

Index: mojo/services/public/cpp/view_manager/lib/view.cc
diff --git a/mojo/services/public/cpp/view_manager/lib/view.cc b/mojo/services/public/cpp/view_manager/lib/view.cc
index 4bcedfce0808a25e082ad798037aa0f993c88066..43f2f4046af760cbe02154a61305943965d151a0 100644
--- a/mojo/services/public/cpp/view_manager/lib/view.cc
+++ b/mojo/services/public/cpp/view_manager/lib/view.cc
@@ -18,16 +18,14 @@ class ScopedDestructionNotifier {
  public:
   explicit ScopedDestructionNotifier(View* view)
       : view_(view) {
-    FOR_EACH_OBSERVER(
-        ViewObserver,
-        *ViewPrivate(view_).observers(),
-        OnViewDestroy(view_, ViewObserver::DISPOSITION_CHANGING));
+    FOR_EACH_OBSERVER(ViewObserver,
+                      *ViewPrivate(view_).observers(),
+                      OnViewDestroying(view_));
   }
   ~ScopedDestructionNotifier() {
-    FOR_EACH_OBSERVER(
-        ViewObserver,
-        *ViewPrivate(view_).observers(),
-        OnViewDestroy(view_, ViewObserver::DISPOSITION_CHANGED));
+    FOR_EACH_OBSERVER(ViewObserver,
+                      *ViewPrivate(view_).observers(),
+                      OnViewDestroyed(view_));
   }
 
  private: