ChromeOS: Keep app list centered when the display rotates by 90 degrees.

ash/wm/app_list_controller.cc

Index: ash/wm/app_list_controller.cc
diff --git a/ash/wm/app_list_controller.cc b/ash/wm/app_list_controller.cc
index d26ff37bcd75d0df703dcb32088c3def8b172185..bf631e79a21b97b53544dd23f26532b49237fb69 100644
--- a/ash/wm/app_list_controller.cc
+++ b/ash/wm/app_list_controller.cc
@@ -167,10 +167,10 @@ void AppListController::SetVisible(bool visible, aura::Window* window) {
         GetContainer(kShellWindowId_AppListContainer);
     if (app_list::switches::IsExperimentalAppListPositionEnabled()) {
       // The experimental app list is centered over the primary display.
-      view->InitAsBubbleAtFixedLocation(
+      view->InitAsBubbleCenteredOnPrimaryDisplay(
           NULL,
           pagination_model_.get(),
-          Shell::GetScreen()->GetPrimaryDisplay().bounds().CenterPoint(),
+          Shell::GetScreen(),
           views::BubbleBorder::FLOAT,
           true /* border_accepts_events */);
     } else {