Keep virtual keyboard visibility the same after enable an IME in a different extension

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 31 matching lines @@
   DCHECK(child == keyboard_);
 
   ui::LayerAnimator* animator =
       controller_->GetContainerWindow()->layer()->GetAnimator();
   // Stops previous animation if a window resize is requested during animation.
   if (animator->is_animating())
     animator->StopAnimating();
 
   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.
+  if (old_bounds.height() == 0 && child->bounds().height() != 0 &&
+      controller_->wait_for_resize_to_show()) {
+    // The window height is set to 0 initially or before switch to an IME in a
+    // different extension. Virtual keyboard window may wait for this bounds
+    // change to correctly animate in.
     controller_->ShowKeyboard(false);
-  } else {
+  } else if (controller_->keyboard_visible()) {
     controller_->NotifyKeyboardBoundsChanging(requested_bounds);
   }
 }
 
 }  // namespace keyboard