Fix stale keyboard bounds on login screen

ui/keyboard/keyboard_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 "ui/keyboard/keyboard_layout_manager.h"
 
 #include "ui/compositor/layer_animator.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_controller_proxy.h"
 #include "ui/keyboard/keyboard_util.h"
@@ skipping 38 matching lines @@
 
   gfx::Rect old_bounds = child->bounds();
   SetChildBoundsDirect(child, requested_bounds);
   if (old_bounds.height() == 0 && child->bounds().height() != 0) {
     // The window height is set to 0 initially. If the height of |old_bounds| is
     // 0 and the new bounds is not 0, it probably means window.resizeTo is
     // called to set the window height. We should try to show keyboard again in
     // case the show keyboard request is called before the height is set.
     controller_->ShowKeyboard(false);
   } else {
-    controller_->NotifyKeyboardBoundsChanging(requested_bounds);
+    // We need to send out this notification only if keyboard is visible since
+    // keyboard window is resized even if keyboard is hidden.
+    if (controller_->keyboard_visible())
+      controller_->NotifyKeyboardBoundsChanging(requested_bounds);
   }
 }
 
 }  // namespace keyboard