mash: Preliminary support for shelf auto-hide

chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
index 033b84f2ae07f81384aba14ee687cec8f67234ff..3ac3c9e830c49215759c12efd090dc4a3942030e 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
@@ -986,6 +986,11 @@ void ChromeLauncherController::OnShelfAutoHideBehaviorChanged(
                                     shelf->auto_hide_behavior());
 }
 
+void ChromeLauncherController::OnShelfAutoHideStateChanged(ash::Shelf* shelf) {}
+
+void ChromeLauncherController::OnShelfVisibilityStateChanged(
+    ash::Shelf* shelf) {}
+
 void ChromeLauncherController::ShelfItemAdded(int index) {
   // The app list launcher can get added to the shelf after we applied the
   // preferences. In that case the item might be at the wrong spot. As such we