Remove top controls clipping adjustment for document.rootScroller

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

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 6e8030fca4ea558c1c7cc5a6ddd66c0f999ffc1b..91c82bdcf3276ac701da5bd92e86ee05da3e6acf 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -1627,20 +1627,23 @@ 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