Fix user pod not always scroll to the center after VK shows up

ash/wm/lock_layout_manager.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/lock_layout_manager.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/wm/lock_window_state.h"
 #include "ash/wm/window_state.h"
@@ skipping 103 matching lines @@
         is_observing_keyboard_ = true;
       }
     } else {
       keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
       is_observing_keyboard_ = false;
     }
   }
 }
 
 void LockLayoutManager::OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) {
+}
+
+void LockLayoutManager::OnKeyboardBoundsChanged(const gfx::Rect& new_bounds) {
   keyboard_bounds_ = new_bounds;
   OnWindowResized();
 }
 
 void LockLayoutManager::AdjustWindowsForWorkAreaChange(
     const wm::WMEvent* event) {
   DCHECK(event->type() == wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED ||
          event->type() == wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
 
   for (aura::Window::Windows::const_iterator it = window_->children().begin();
        it != window_->children().end();
        ++it) {
     wm::GetWindowState(*it)->OnWMEvent(event);
   }
 }
 
 }  // namespace ash