Remove top controls clipping adjustment for document.rootScroller

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 1609 matching lines @@
     if (ScrollingCoordinator* scrollingCoordinator =
             this->scrollingCoordinator())
       scrollingCoordinator->frameViewFixedObjectsDidChange(this);
   }
 }
 
 void FrameView::viewportSizeChanged(bool widthChanged, bool heightChanged) {
   DCHECK(widthChanged || heightChanged);
   DCHECK(m_frame->page());
 
+  bool rootLayerScrollingEnabled =
+      RuntimeEnabledFeatures::rootLayerScrollingEnabled();
+
   if (LayoutViewItem layoutView = this->layoutViewItem()) {
-    if (layoutView.usesCompositing())
-      layoutView.compositor()->frameViewDidChangeSize();
+    if (layoutView.usesCompositing()) {
+      if (rootLayerScrollingEnabled) {
+        layoutView.layer()->setNeedsCompositingInputsUpdate();
+        if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
+          setNeedsPaintPropertyUpdate();
+      } else {
+        layoutView.compositor()->frameViewDidChangeSize();
+      }
+    }
   }
 
-  // Ensure the root scroller compositing layers update geometry in response to
-  // the URL bar resizing.
-  if (m_frame->isMainFrame())
-    m_frame->page()->globalRootScrollerController().mainFrameViewResized();
-
   showOverlayScrollbars();
 
-  bool rootLayerScrollingEnabled =
-      RuntimeEnabledFeatures::rootLayerScrollingEnabled();
   if (rootLayerScrollingEnabled) {
     // The background must be repainted when the FrameView is resized, even if
     // the initial containing block does not change (so we can't rely on layout
     // to issue the invalidation).  This is because the background fills the
     // main GraphicsLayer, which takes the size of the layout viewport.
     // TODO(skobes): Paint non-fixed backgrounds into the scrolling contents
     // layer and avoid this invalidation (http://crbug.com/568847).
     LayoutViewItem lvi = layoutViewItem();
     if (!lvi.isNull())
       lvi.setShouldDoFullPaintInvalidation();
@@ skipping 3603 matching lines @@
 void FrameView::setAnimationHost(
     std::unique_ptr<CompositorAnimationHost> host) {
   m_animationHost = std::move(host);
 }
 
 LayoutUnit FrameView::caretWidth() const {
   return LayoutUnit(getHostWindow()->windowToViewportScalar(1));
 }
 
 }  // namespace blink