window.print() should close form validation bubble.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 666 matching lines @@
     did_request_non_empty_tool_tip_ = false;
   }
 }
 
 void ChromeClientImpl::DispatchViewportPropertiesDidChange(
     const ViewportDescription& description) const {
   web_view_->UpdatePageDefinedViewportConstraints(description);
 }
 
 void ChromeClientImpl::PrintDelegate(LocalFrame* frame) {
+  NotifyPopupOpeningObservers();
   if (web_view_->Client())
     web_view_->Client()->PrintPage(WebLocalFrameImpl::FromFrame(frame));
 }
 
 ColorChooser* ChromeClientImpl::OpenColorChooser(
     LocalFrame* frame,
     ColorChooserClient* chooser_client,
     const Color&) {
   NotifyPopupOpeningObservers();
   ColorChooserUIController* controller = nullptr;
@@ skipping 537 matching lines @@
   if (RuntimeEnabledFeatures::presentationEnabled())
     PresentationController::ProvideTo(frame, client->PresentationClient());
   if (RuntimeEnabledFeatures::audioOutputDevicesEnabled()) {
     ProvideAudioOutputDeviceClientTo(frame,
                                      new AudioOutputDeviceClientImpl(frame));
   }
   InstalledAppController::ProvideTo(frame, client->GetRelatedAppsFetcher());
 }
 
 }  // namespace blink