Add an error page for resources blocked via XSS Auditor.

third_party/WebKit/Source/core/frame/Frame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
@@ skipping 176 matching lines @@
     if (hasUserGesture || isAllowedNavigation)
       return true;
     errorReason =
         "The frame attempting navigation is targeting its top-level window, "
         "but is neither same-origin with its target nor is it processing a "
         "user gesture. See "
         "https://www.chromestatus.com/features/5851021045661696.";
     printNavigationErrorMessage(targetFrame, errorReason.latin1().data());
     if (isLocalFrame())
       toLocalFrame(this)->navigationScheduler().schedulePageBlock(
-          toLocalFrame(this)->document());
+          toLocalFrame(this)->document(), -27 /* net::ERR_BLOCKED_BY_CLIENT */);
     return false;
   }
   if (!isAllowedNavigation && !errorReason.isNull())
     printNavigationErrorMessage(targetFrame, errorReason.latin1().data());
   return isAllowedNavigation;
 }
 
 bool Frame::canNavigateWithoutFramebusting(const Frame& targetFrame,
                                            String& reason) {
   if (securityContext()->isSandboxed(SandboxNavigation)) {
@@ skipping 122 matching lines @@
 
   ASSERT(page());
 
   if (m_owner)
     m_owner->setContentFrame(*this);
   else
     page()->setMainFrame(this);
 }
 
 }  // namespace blink