Fixed clip resize for document.rootScroller with inertTopControls

third_party/WebKit/Source/core/layout/compositing/CompositingInputsUpdater.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/compositing/CompositingInputsUpdater.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutView.h"
@@ skipping 221 matching lines @@
 
   if (layer->scrollsOverflow())
     info.lastScrollingAncestor = layer;
 
   if (layer->layoutObject()->hasClipRelatedProperty())
     info.hasAncestorWithClipRelatedProperty = true;
 
   if (layer->layoutObject()->hasClipPath())
     info.hasAncestorWithClipPath = true;
 
+  layer->setIsRootScroller(layer ==
+                           layer->layoutObject()
+                               ->document()
+                               .rootScrollerController()
+                               ->rootScrollerPaintLayer());
+
   bool hasDescendantWithClipPath = false;
   bool hasNonIsolatedDescendantWithBlendMode = false;
   bool hasRootScrollerAsDescendant = false;
   for (PaintLayer* child = layer->firstChild(); child;
        child = child->nextSibling()) {
     updateRecursive(child, updateType, info);
 
-    hasRootScrollerAsDescendant |= child->hasRootScrollerAsDescendant() ||
-                                   (child ==
-                                    child->layoutObject()
-                                        ->document()
-                                        .rootScrollerController()
-                                        ->rootScrollerPaintLayer());
+    hasRootScrollerAsDescendant |=
+        child->hasRootScrollerAsDescendant() || child->isRootScroller();
     hasDescendantWithClipPath |= child->hasDescendantWithClipPath() ||
                                  child->layoutObject()->hasClipPath();
     hasNonIsolatedDescendantWithBlendMode |=
         (!child->stackingNode()->isStackingContext() &&
          child->hasNonIsolatedDescendantWithBlendMode()) ||
         child->layoutObject()->style()->hasBlendMode();
   }
 
   layer->updateDescendantDependentCompositingInputs(
       hasDescendantWithClipPath, hasNonIsolatedDescendantWithBlendMode,
@@ skipping 11 matching lines @@
   ASSERT(!layer->needsCompositingInputsUpdate());
 
   for (PaintLayer* child = layer->firstChild(); child;
        child = child->nextSibling())
     assertNeedsCompositingInputsUpdateBitsCleared(child);
 }
 
 #endif
 
 }  // namespace blink