Move TopDocumentRootScrollerController to a separate object on FrameHost

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 64 matching lines @@
 #include "core/layout/svg/LayoutSVGRoot.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/observer/ResizeObserverController.h"
 #include "core/page/AutoscrollController.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/FocusController.h"
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
-#include "core/page/scrolling/RootScrollerController.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
+#include "core/page/scrolling/TopDocumentRootScrollerController.h"
 #include "core/paint/FramePainter.h"
 #include "core/paint/PaintLayer.h"
 #include "core/paint/PrePaintTreeWalk.h"
 #include "core/plugins/PluginView.h"
 #include "core/style/ComputedStyle.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGSVGElement.h"
 #include "platform/Histogram.h"
 #include "platform/HostWindow.h"
 #include "platform/RuntimeEnabledFeatures.h"
@@ skipping 2331 matching lines @@
     DCHECK(m_frame->document());
 
     if (m_frame->isMainFrame()) {
         ScrollableArea& visualViewport = frameHost->visualViewport();
         ScrollableArea* layoutViewport = layoutViewportScrollableArea();
         DCHECK(layoutViewport);
 
         RootFrameViewport* rootFrameViewport =
             RootFrameViewport::create(visualViewport, *layoutViewport);
         m_viewportScrollableArea = rootFrameViewport;
+
+        frameHost->globalRootScrollerController()
+            .initializeViewportScrollCallback(*rootFrameViewport);
     }
 }
 
 void FrameView::updateScrollCorner()
 {
     RefPtr<ComputedStyle> cornerStyle;
     IntRect cornerRect = scrollCornerRect();
     Document* doc = m_frame->document();
 
     if (doc && !cornerRect.isEmpty()) {
@@ skipping 176 matching lines @@
         {
             TRACE_EVENT1("devtools.timeline", "UpdateLayerTree", "data", InspectorUpdateLayerTreeEvent::data(m_frame.get()));
 
             // This was required for slimming paint v1 but is only temporarily
             // needed for slimming paint v2.
             view.compositor()->updateIfNeededRecursive();
             scrollContentsIfNeededRecursive();
 
             DCHECK(lifecycle().state() >= DocumentLifecycle::CompositingClean);
 
+            m_frame->host()->globalRootScrollerController().didUpdateCompositing();
+
             if (targetState >= DocumentLifecycle::PrePaintClean) {
                 if (!RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
                     invalidateTreeIfNeededRecursive();
 
                 if (view.compositor()->inCompositingMode())
                     scrollingCoordinator()->updateAfterCompositingChangeIfNeeded();
 
                 updateCompositedSelectionIfNeeded();
             }
         }
@@ skipping 1708 matching lines @@
 }
 
 bool FrameView::canThrottleRendering() const
 {
     if (!RuntimeEnabledFeatures::renderingPipelineThrottlingEnabled())
         return false;
     return m_subtreeThrottled || (m_hiddenForThrottling && m_crossOriginForThrottling);
 }
 
 } // namespace blink