Move scroll event handlers from layer to layer tree view.

third_party/WebKit/Source/web/WebPagePopupImpl.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 163 matching lines @@
             return m_popup->m_layerTreeView->setHaveWheelEventHandlers(haveEventHandlers);
     }
 
     bool haveWheelEventHandlers() const override
     {
         if (m_popup->m_layerTreeView)
             return m_popup->m_layerTreeView->haveWheelEventHandlers();
         return false;
     }
 
+    void setHaveScrollEventHandlers(bool hasEventHandlers) override
+    {
+        if (m_popup->m_layerTreeView)
+            m_popup->m_layerTreeView->setHaveScrollEventHandlers(hasEventHandlers);
+    }
+
+    bool haveScrollEventHandlers() const override
+    {
+        if (m_popup->m_layerTreeView)
+            return m_popup->m_layerTreeView->haveScrollEventHandlers();
+        return false;
+    }
+
     void setTouchAction(TouchAction touchAction) override
     {
         if (WebViewClient* client = m_popup->m_webView->client())
             client->setTouchAction(static_cast<WebTouchAction>(touchAction));
     }
 
     GraphicsLayerFactory* graphicsLayerFactory() const override
     {
         return m_popup->m_webView->graphicsLayerFactory();
     }
@@ skipping 364 matching lines @@
     // A WebPagePopupImpl instance usually has two references.
     //  - One owned by the instance itself. It represents the visible widget.
     //  - One owned by a WebViewImpl. It's released when the WebViewImpl ask the
     //    WebPagePopupImpl to close.
     // We need them because the closing operation is asynchronous and the widget
     // can be closed while the WebViewImpl is unaware of it.
     return adoptRef(new WebPagePopupImpl(client)).leakRef();
 }
 
 } // namespace blink