Make all gesture scrolls use customization path internally

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 462 matching lines @@
         FrameFetchContext::provideDocumentToContext(m_fetcher->context(), this);
     } else if (m_importsController) {
         m_fetcher = FrameFetchContext::createContextAndFetcher(nullptr, this);
     } else {
         m_fetcher = ResourceFetcher::create(nullptr);
     }
 
     ViewportScrollCallback* applyScroll = nullptr;
     if (isInMainFrame()) {
         applyScroll = RootScrollerController::createViewportApplyScroll(
-            frameHost()->topControls(), frameHost()->overscrollController());
+            &frameHost()->topControls(), &frameHost()->overscrollController());
+    } else {
+        applyScroll =
+            RootScrollerController::createViewportApplyScroll(nullptr, nullptr);
     }
+
     m_rootScrollerController =
         RootScrollerController::create(*this, applyScroll);
 
     // We depend on the url getting immediately set in subframes, but we
     // also depend on the url NOT getting immediately set in opened windows.
     // See fast/dom/early-frame-url.html
     // and fast/dom/location-new-window-no-crash.html, respectively.
     // FIXME: Can/should we unify this behavior?
     if (initializer.shouldSetURL())
         setURL(initializer.url());
@@ skipping 116 matching lines @@
 void Document::setRootScroller(Element* newScroller, ExceptionState& exceptionState)
 {
     m_rootScrollerController->set(newScroller);
 }
 
 Element* Document::rootScroller() const
 {
     return m_rootScrollerController->get();
 }
 
-bool Document::isEffectiveRootScroller(const Element& element) const
+Element* Document::effectiveRootScroller() const
 {
-    return m_rootScrollerController->effectiveRootScroller() == element;
+    return m_rootScrollerController->effectiveRootScroller();
 }
 
 bool Document::isInMainFrame() const
 {
     return frame() && frame()->isMainFrame();
 }
 
 AtomicString Document::convertLocalName(const AtomicString& name)
 {
     return isHTMLDocument() ? name.lower() : name;
@@ skipping 5372 matching lines @@
 }
 
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().getString().utf8().data());
 }
 #endif