ash: Move VirtualKeyboardStateObserver functionality to ShellObserver

ash/test/test_shell_delegate.cc

Index: ash/test/test_shell_delegate.cc
diff --git a/ash/test/test_shell_delegate.cc b/ash/test/test_shell_delegate.cc
index 495959d6a3723eed5026e75e08b569d68f4e0ae3..5e768ef53d23eab2a5ec261af98cbf13ccad207f 100644
--- a/ash/test/test_shell_delegate.cc
+++ b/ash/test/test_shell_delegate.cc
@@ -148,22 +148,6 @@ keyboard::KeyboardUI* TestShellDelegate::CreateKeyboardUI() {
   return new TestKeyboardUI;
 }
 
-void TestShellDelegate::VirtualKeyboardActivated(bool activated) {
-  FOR_EACH_OBSERVER(ash::VirtualKeyboardStateObserver,
-                    keyboard_state_observer_list_,
-                    OnVirtualKeyboardStateChanged(activated));
-}
-
-void TestShellDelegate::AddVirtualKeyboardStateObserver(
-    VirtualKeyboardStateObserver* observer) {
-  keyboard_state_observer_list_.AddObserver(observer);
-}
-
-void TestShellDelegate::RemoveVirtualKeyboardStateObserver(
-    VirtualKeyboardStateObserver* observer) {
-  keyboard_state_observer_list_.RemoveObserver(observer);
-}
-
 void TestShellDelegate::OpenUrl(const GURL& url) {}
 
 app_list::AppListPresenter* TestShellDelegate::GetAppListPresenter() {