Revert of Added HALF, FULLSCREEN_ALL_APPS, and FULLSCREEN_SEARCH.

ash/app_list/app_list_presenter_delegate.cc

Index: ash/app_list/app_list_presenter_delegate.cc
diff --git a/ash/app_list/app_list_presenter_delegate.cc b/ash/app_list/app_list_presenter_delegate.cc
index 16eae26ef31805ce430f469e5fec43a86012cb6b..fc81a0ab465a3c04fea5fb455ba19c0594ed625a 100644
--- a/ash/app_list/app_list_presenter_delegate.cc
+++ b/ash/app_list/app_list_presenter_delegate.cc
@@ -58,19 +58,6 @@
   return bounds.CenterPoint();
 }
 
-// Whether the shelf is oriented on the side, not on the bottom.
-bool IsSideShelf(aura::Window* root_window) {
-  Shelf* shelf = Shelf::ForWindow(root_window);
-  switch (shelf->alignment()) {
-    case SHELF_ALIGNMENT_BOTTOM:
-    case SHELF_ALIGNMENT_BOTTOM_LOCKED:
-      return false;
-    case SHELF_ALIGNMENT_LEFT:
-    case SHELF_ALIGNMENT_RIGHT:
-      return true;
-  }
-}
-
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -111,11 +98,7 @@
   aura::Window* container = RootWindowController::ForWindow(root_window)
                                 ->GetContainer(kShellWindowId_AppListContainer);
 
-  view->Initialize(container, current_apps_page,
-                   Shell::Get()
-                       ->maximize_mode_controller()
-                       ->IsMaximizeModeWindowManagerEnabled(),
-                   IsSideShelf(root_window));
+  view->Initialize(container, current_apps_page);
 
   if (!app_list::features::IsFullscreenAppListEnabled()) {
     view->MaybeSetAnchorPoint(GetCenterOfDisplayForWindow(
@@ -246,18 +229,4 @@
     presenter_->Dismiss();
 }
 
-void AppListPresenterDelegate::OnMaximizeModeStarted() {
-  if (!app_list::features::IsFullscreenAppListEnabled())
-    return;
-
-  view_->OnMaximizeModeChanged(true);
-}
-
-void AppListPresenterDelegate::OnMaximizeModeEnded() {
-  if (!app_list::features::IsFullscreenAppListEnabled())
-    return;
-
-  view_->OnMaximizeModeChanged(false);
-}
-
 }  // namespace ash