MainFrame scrollbars should work with RFV instead of FV

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

Index: third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
diff --git a/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp b/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
index f7bce5958ef484b82715c7b7fc5081288f96a26a..e3b1d42578fb339e27fc472f10da2200bcfe75c9 100644
--- a/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
+++ b/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
@@ -177,6 +177,84 @@ ScrollBehavior RootFrameViewport::scrollBehaviorStyle() const {
   return layoutViewport().scrollBehaviorStyle();
 }
 
+bool RootFrameViewport::hasOverlayScrollbars() const {
+  return layoutViewport().hasOverlayScrollbars();
+}
+
+void RootFrameViewport::setScrollbarNeedsPaintInvalidation(
+    ScrollbarOrientation orientation) {
+  return layoutViewport().setScrollbarNeedsPaintInvalidation(orientation);
+}
+
+LayoutRect RootFrameViewport::visualRectForScrollbarParts() const {
+  return layoutViewport().visualRectForScrollbarParts();
+}
+
+ScrollbarOverlayColorTheme RootFrameViewport::getScrollbarOverlayColorTheme()
+    const {
+  return layoutViewport().getScrollbarOverlayColorTheme();
+}
+
+void RootFrameViewport::setTickmarks(const Vector<IntRect>& tickmarks) {
+  m_tickmarks = tickmarks;
+}
+
+void RootFrameViewport::getTickmarks(Vector<IntRect>& tickmarks) const {
+  if (!m_tickmarks.isEmpty())
+    tickmarks = m_tickmarks;
+  else
+    layoutViewport().getTickmarks(tickmarks);
+}
+
+void RootFrameViewport::mouseEnteredScrollbar(Scrollbar& scrollbar) const {
+  layoutViewport().mouseEnteredScrollbar(scrollbar);
+}
+
+void RootFrameViewport::mouseExitedScrollbar(Scrollbar& scrollbar) const {
+  layoutViewport().mouseExitedScrollbar(scrollbar);
+}
+
+void RootFrameViewport::scrollbarVisibilityChanged() {
+  layoutViewport().scrollbarVisibilityChanged();
+}
+
+IntRect RootFrameViewport::convertFromScrollbarToContainingWidget(
+    const Scrollbar& scrollbar,
+    const IntRect& localRect) const {
+  return layoutViewport().convertFromScrollbarToContainingWidget(scrollbar,
+                                                                 localRect);
+}
+
+IntRect RootFrameViewport::convertFromContainingWidgetToScrollbar(
+    const Scrollbar& scrollbar,
+    const IntRect& parentRect) const {
+  return layoutViewport().convertFromContainingWidgetToScrollbar(scrollbar,
+                                                                 parentRect);
+}
+
+IntPoint RootFrameViewport::convertFromScrollbarToContainingWidget(
+    const Scrollbar& scrollbar,
+    const IntPoint& localPoint) const {
+  return layoutViewport().convertFromScrollbarToContainingWidget(scrollbar,
+                                                                 localPoint);
+}
+
+IntPoint RootFrameViewport::convertFromContainingWidgetToScrollbar(
+    const Scrollbar& scrollbar,
+    const IntPoint& parentPoint) const {
+  return layoutViewport().convertFromContainingWidgetToScrollbar(scrollbar,
+                                                                 parentPoint);
+}
+
+ScrollOffset RootFrameViewport::scrollAnimatorDesiredTargetOffset() const {
+  return layoutViewport().scrollAnimatorDesiredTargetOffset() +
+         visualViewport().scrollAnimatorDesiredTargetOffset();
+}
+
+void RootFrameViewport::setScrollCornerNeedsPaintInvalidation() {
+  return layoutViewport().setScrollCornerNeedsPaintInvalidation();
+}
+
 LayoutRect RootFrameViewport::scrollIntoView(const LayoutRect& rectInContent,
                                              const ScrollAlignment& alignX,
                                              const ScrollAlignment& alignY,