Communicate whether passive event listeners exist to cc.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index 02bb02e23e9a9236e966b80896335740fd802589..c5af44a941394f3e3e788d87bb857bf25772ea9d 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -876,22 +876,20 @@ bool ChromeClientImpl::shouldOpenModalDialogDuringPageDismissal(const DialogType
     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);
 
-void ChromeClientImpl::setHaveWheelEventHandlers(bool hasEventHandlers)
-{
     if (WebLayerTreeView* treeView = m_webView->layerTreeView())
-        treeView->setHaveWheelEventHandlers(hasEventHandlers);
+        treeView->setEventListenerProperties(eventClass, properties);
 }
 
-bool ChromeClientImpl::haveWheelEventHandlers() const
+WebEventListenerProperties ChromeClientImpl::eventListenerProperties(WebEventListenerClass eventClass) 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.