Ignore print() during page dismissal.

third_party/WebKit/Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights
  * reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 269 matching lines @@
   virtual DOMWindow* PagePopupWindowForTesting() const = 0;
 
   virtual void PostAccessibilityNotification(AXObject*,
                                              AXObjectCache::AXNotification) {}
   virtual String AcceptLanguages() = 0;
 
   enum DialogType {
     kAlertDialog = 0,
     kConfirmDialog = 1,
     kPromptDialog = 2,
-    kHTMLDialog = 3
+    kHTMLDialog = 3,
+    kPrintDialog = 4
   };
   virtual bool ShouldOpenModalDialogDuringPageDismissal(
       LocalFrame&,
       DialogType,
       const String&,
       Document::PageDismissalType) const {
     return true;
   }
 
   virtual bool IsSVGImageChromeClient() const { return false; }
@@ skipping 77 matching lines @@
   WeakMember<Node> last_mouse_over_node_;
   LayoutPoint last_tool_tip_point_;
   String last_tool_tip_text_;
 
   FRIEND_TEST_ALL_PREFIXES(ChromeClientTest, SetToolTipFlood);
 };
 
 }  // namespace blink
 
 #endif  // ChromeClient_h