mash: Migrate Shelf aura::Window uses to WmWindow.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 3b69f661ac94b9a2dbf33adab9aef0abb6cf9e50..8d26ec981587a9ce20cd64db81649ba635b65cd1 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -373,11 +373,6 @@ void Shell::CreateShelf() {
     (*iter)->CreateShelf();
 }
 
-void Shell::OnShelfCreatedForRootWindow(WmWindow* root_window) {
-  FOR_EACH_OBSERVER(ShellObserver, *wm_shell_->shell_observers(),
-                    OnShelfCreatedForRootWindow(root_window));
-}
-
 void Shell::CreateKeyboard() {
   if (in_mus_)
     return;
@@ -443,16 +438,6 @@ void Shell::UpdateShelfVisibility() {
       (*iter)->UpdateShelfVisibility();
 }
 
-void Shell::OnShelfAlignmentChanged(WmWindow* root_window) {
-  FOR_EACH_OBSERVER(ShellObserver, *wm_shell_->shell_observers(),
-                    OnShelfAlignmentChanged(root_window));
-}
-
-void Shell::OnShelfAutoHideBehaviorChanged(WmWindow* root_window) {
-  FOR_EACH_OBSERVER(ShellObserver, *wm_shell_->shell_observers(),
-                    OnShelfAutoHideBehaviorChanged(root_window));
-}
-
 void Shell::CreateModalBackground(aura::Window* window) {
   RootWindowControllerList controllers = GetAllRootWindowControllers();
   for (RootWindowControllerList::iterator iter = controllers.begin();