Add a counter and a deprecation message when navigating in an unload handler.

third_party/WebKit/Source/core/loader/NavigationScheduler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2009 Adam Barth. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 16 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/loader/NavigationScheduler.h"
 
 #include "bindings/core/v8/ScriptController.h"
 #include "core/events/Event.h"
 #include "core/fetch/ResourceLoaderOptions.h"
+#include "core/frame/Deprecation.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FormSubmission.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/FrameLoaderStateMachine.h"
 #include "core/page/Page.h"
 #include "platform/SharedBuffer.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/scheduler/CancellableTaskFactory.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCachePolicy.h"
 #include "public/platform/WebScheduler.h"
 #include "wtf/CurrentTime.h"
 
 namespace blink {
 
 unsigned NavigationDisablerForBeforeUnload::s_navigationDisableCount = 0;
+unsigned NavigationCounterForUnload::s_inUnloadHandler = 0;
 
 class ScheduledNavigation : public GarbageCollectedFinalized<ScheduledNavigation> {
     WTF_MAKE_NONCOPYABLE(ScheduledNavigation);
 public:
     ScheduledNavigation(double delay, Document* originDocument, bool replacesCurrentItem, bool isLocationChange)
         : m_delay(delay)
         , m_originDocument(originDocument)
         , m_replacesCurrentItem(replacesCurrentItem)
         , m_isLocationChange(isLocationChange)
         , m_wasUserGesture(UserGestureIndicator::processingUserGesture())
@@ skipping 271 matching lines @@
 
     replacesCurrentItem = replacesCurrentItem || mustReplaceCurrentItem(m_frame);
 
     // If the URL we're going to navigate to is the same as the current one, except for the
     // fragment part, we don't need to schedule the location change. We'll skip this
     // optimization for cross-origin navigations to minimize the navigator's ability to
     // execute timing attacks.
     if (originDocument->getSecurityOrigin()->canAccess(m_frame->document()->getSecurityOrigin())) {
         KURL parsedURL(ParsedURLString, url);
         if (parsedURL.hasFragmentIdentifier() && equalIgnoringFragmentIdentifier(m_frame->document()->url(), parsedURL)) {
+            if (NavigationCounterForUnload::inUnloadHandler())
+                Deprecation::countDeprecation(m_frame, UseCounter::UnloadHandler_Navigation);
+
             FrameLoadRequest request(originDocument, m_frame->document()->completeURL(url), "_self");
             request.setReplacesCurrentItem(replacesCurrentItem);
             if (replacesCurrentItem)
                 request.setClientRedirect(ClientRedirectPolicy::ClientRedirect);
             m_frame->loader().load(request);
             return;
         }
     }
 
     schedule(ScheduledLocationChange::create(originDocument, url, replacesCurrentItem));
@@ skipping 85 matching lines @@
     m_redirect.clear();
 }
 
 DEFINE_TRACE(NavigationScheduler)
 {
     visitor->trace(m_frame);
     visitor->trace(m_redirect);
 }
 
 } // namespace blink