Observes work area change and auto-hide for notifications.

ash/shelf/shelf_layout_manager.cc

Index: ash/shelf/shelf_layout_manager.cc
diff --git a/ash/shelf/shelf_layout_manager.cc b/ash/shelf/shelf_layout_manager.cc
index b0dab2fa6b0c742c1b128eb0afef4c4c3df73f07..21e46d8ae4a45cdc2de59c08f1b3ea9989475eea 100644
--- a/ash/shelf/shelf_layout_manager.cc
+++ b/ash/shelf/shelf_layout_manager.cc
@@ -70,11 +70,6 @@ bool IsDraggingTrayEnabled() {
   return dragging_tray_allowed;
 }
 
-int GetPreferredShelfSize() {
-  return ash::switches::UseAlternateShelfLayout() ?
-      ShelfLayoutManager::kShelfSize : kLauncherPreferredSize;
-}
-
 }  // namespace
 
 // static
@@ -89,6 +84,11 @@ const int ShelfLayoutManager::kAutoHideSize = 3;
 // static
 const int ShelfLayoutManager::kShelfSize = 47;
 
+int ShelfLayoutManager::GetPreferredShelfSize() {
+  return ash::switches::UseAlternateShelfLayout() ?
+      ShelfLayoutManager::kShelfSize : kLauncherPreferredSize;
+}
+
 // ShelfLayoutManager::AutoHideEventFilter -------------------------------------
 
 // Notifies ShelfLayoutManager any time the mouse moves.