Move scroll event handlers from layer to layer tree view.

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 7c169b256a7f7298d712a410a9ebe89b0a46a89c..02bb02e23e9a9236e966b80896335740fd802589 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -894,6 +894,19 @@ bool ChromeClientImpl::haveWheelEventHandlers() const
     return false;
 }
 
+void ChromeClientImpl::setHaveScrollEventHandlers(bool hasEventHandlers)
+{
+    if (WebLayerTreeView* treeView = m_webView->layerTreeView())
+        treeView->setHaveScrollEventHandlers(hasEventHandlers);
+}
+
+bool ChromeClientImpl::haveScrollEventHandlers() const
+{
+    if (WebLayerTreeView* treeView = m_webView->layerTreeView())
+        return treeView->haveScrollEventHandlers();
+    return false;
+}
+
 void ChromeClientImpl::setTouchAction(TouchAction touchAction)
 {
     if (WebViewClient* client = m_webView->client())