Moves Shell::CreateShelf() to WmShell

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index d4587091598c1b1e5296a78d0c88776b44dd62e9..396e79c858270f1b93ee88b5e56ad0e6cd728f45 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -275,7 +275,7 @@ void Shell::OnLoginStateChanged(LoginStatus status) {
 }
 
 void Shell::OnLoginUserProfilePrepared() {
-  CreateShelf();
+  wm_shell_->CreateShelf();
   CreateKeyboard();
 }
 
@@ -318,18 +318,6 @@ void Shell::OnRootWindowAdded(WmWindow* root_window) {
                     OnRootWindowAdded(root_window));
 }
 
-void Shell::CreateShelf() {
-  // Must occur after SessionStateDelegate creation and user login.
-  DCHECK(session_state_delegate_);
-  DCHECK_GT(session_state_delegate_->NumberOfLoggedInUsers(), 0);
-  wm_shell_->CreateShelfDelegate();
-
-  RootWindowControllerList controllers = GetAllRootWindowControllers();
-  for (RootWindowControllerList::iterator iter = controllers.begin();
-       iter != controllers.end(); ++iter)
-    (*iter)->CreateShelf();
-}
-
 void Shell::CreateKeyboard() {
   // TODO(bshe): Primary root window controller may not be the controller to
   // attach virtual keyboard. See http://crbug.com/303429