Deleted AppListViewDelegateObserver class (was unused).

ui/app_list/views/app_list_view.cc

Index: ui/app_list/views/app_list_view.cc
diff --git a/ui/app_list/views/app_list_view.cc b/ui/app_list/views/app_list_view.cc
index 4bfdb605f09931832edf28338527fe7791f0d852..beffb2960eec8e47154c27ffff64942358b4cc6b 100644
--- a/ui/app_list/views/app_list_view.cc
+++ b/ui/app_list/views/app_list_view.cc
@@ -202,13 +202,11 @@ AppListView::AppListView(AppListViewDelegate* delegate)
       animation_observer_(new HideViewAnimationObserver()) {
   CHECK(delegate);
 
-  delegate_->AddObserver(this);
   delegate_->GetSpeechUI()->AddObserver(this);
 }
 
 AppListView::~AppListView() {
   delegate_->GetSpeechUI()->RemoveObserver(this);
-  delegate_->RemoveObserver(this);
   animation_observer_.reset();
   // Remove child views first to ensure no remaining dependencies on delegate_.
   RemoveAllChildViews(true);
@@ -348,11 +346,6 @@ bool AppListView::ShouldDescendIntoChildForEventHandling(
       ShouldDescendIntoChildForEventHandling(child, location);
 }
 
-void AppListView::OnShutdown() {
-  // Nothing to do on views - the widget will soon be closed, which will tear
-  // everything down.
-}
-
 void AppListView::SetProfileByPath(const base::FilePath& profile_path) {
   delegate_->SetProfileByPath(profile_path);
   app_list_main_view_->ModelChanged();