Communicate whether passive event listeners exist to cc.

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 858 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(dismissal < static_cast<int>(WTF_ARRAY_LENGTH(kDismissals)));
 
     Platform::current()->histogramEnumeration("Renderer.ModalDialogsDuringPageDismissal", dismissal * WTF_ARRAY_LENGTH(kDialogs) + dialog, WTF_ARRAY_LENGTH(kDialogs) * WTF_ARRAY_LENGTH(kDismissals));
 
     String message = String("Blocked ") + kDialogs[dialog] + "('" + dialogMessage + "') during " + kDismissals[dismissal] + ".";
     m_webView->mainFrame()->addMessageToConsole(WebConsoleMessage(WebConsoleMessage::LevelError, message));
 
     return false;
 }
 
-void ChromeClientImpl::needTouchEvents(bool needsTouchEvents)
+void ChromeClientImpl::setEventListenerProperties(WebEventListenerClass eventClass, WebEventListenerProperties properties)
 {
-    m_webView->hasTouchEventHandlers(needsTouchEvents);
+    if (eventClass == WebEventListenerClass::Touch)
+        m_webView->hasTouchEventHandlers(properties != WebEventListenerProperties::Nothing);
+
+    if (WebLayerTreeView* treeView = m_webView->layerTreeView())
+        treeView->setEventListenerProperties(eventClass, properties);
 }
 
-void ChromeClientImpl::setHaveWheelEventHandlers(bool hasEventHandlers)
+WebEventListenerProperties ChromeClientImpl::eventListenerProperties(WebEventListenerClass eventClass) const
 {
     if (WebLayerTreeView* treeView = m_webView->layerTreeView())
-        treeView->setHaveWheelEventHandlers(hasEventHandlers);
-}
-
-bool ChromeClientImpl::haveWheelEventHandlers() const
-{
-    if (WebLayerTreeView* treeView = m_webView->layerTreeView())
-        return treeView->haveWheelEventHandlers();
-    return false;
+        return treeView->eventListenerProperties(eventClass);
+    return WebEventListenerProperties::Nothing;
 }
 
 void ChromeClientImpl::setHaveScrollEventHandlers(bool hasEventHandlers)

[Rick Byers, 2016/02/02 21:44:46]

should these be folded into the above general functions now too?

[dtapuska, 2016/02/03 16:30:58]

I treated scroll event handlers as a separate one since it is always only
boolean in condition.

 {
     if (WebLayerTreeView* treeView = m_webView->layerTreeView())
         treeView->setHaveScrollEventHandlers(hasEventHandlers);
 }
 
 bool ChromeClientImpl::haveScrollEventHandlers() const
 {
     if (WebLayerTreeView* treeView = m_webView->layerTreeView())
         return treeView->haveScrollEventHandlers();
     return false;
@@ skipping 150 matching lines @@
     if (m_webView->pageImportanceSignals())
         m_webView->pageImportanceSignals()->setIssuedNonGetFetchFromScript();
 }
 
 PassOwnPtr<WebFrameScheduler> ChromeClientImpl::createFrameScheduler()
 {
     return m_webView->scheduler()->createFrameScheduler().release();
 }
 
 } // namespace blink