ash: Move VirtualKeyboardStateObserver functionality to ShellObserver

chrome/browser/chromeos/login/lock/webui_screen_locker.h

Index: chrome/browser/chromeos/login/lock/webui_screen_locker.h
diff --git a/chrome/browser/chromeos/login/lock/webui_screen_locker.h b/chrome/browser/chromeos/login/lock/webui_screen_locker.h
index ecc3d26eb532e9df0b55707319db67eb08df41e6..f62b2e71c6cb0ac64c628ffcd50150b534bcd5fd 100644
--- a/chrome/browser/chromeos/login/lock/webui_screen_locker.h
+++ b/chrome/browser/chromeos/login/lock/webui_screen_locker.h
@@ -10,7 +10,7 @@
 #include <memory>
 #include <string>
 
-#include "ash/common/shell_delegate.h"
+#include "ash/common/shell_observer.h"
 #include "ash/wm/lock_state_observer.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ -55,7 +55,7 @@ class WebUIScreenLocker : public WebUILoginView,
                           public ash::LockStateObserver,
                           public views::WidgetObserver,
                           public PowerManagerClient::Observer,
-                          public ash::VirtualKeyboardStateObserver,
+                          public ash::ShellObserver,
                           public keyboard::KeyboardControllerObserver,
                           public display::DisplayObserver,
                           public content::WebContentsObserver {
@@ -114,7 +114,7 @@ class WebUIScreenLocker : public WebUILoginView,
   // content::WebContentsObserver:
   void RenderProcessGone(base::TerminationStatus status) override;
 
-  // ash::KeyboardStateObserver:
+  // ash::ShellObserver:
   void OnVirtualKeyboardStateChanged(bool activated) override;
 
   // keyboard::KeyboardControllerObserver: