LayoutMenuList::ControlClipRect may depend on size of children

third_party/WebKit/Source/core/paint/PrePaintTreeWalk.cpp

 // Copyright 2015 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/paint/PrePaintTreeWalk.h"
 
 #include "core/dom/DocumentLifecycle.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutMultiColumnSpannerPlaceholder.h"
@@ skipping 291 matching lines @@
     return;
 
   PrePaintTreeWalkContext context(parent_context,
                                   needs_tree_builder_context_update);
 
   // This must happen before updatePropertiesForSelf, because the latter reads
   // some of the state computed here.
   UpdateAuxiliaryObjectProperties(object, context);
 
   if (context.tree_builder_context) {
-    DCHECK(context.tree_builder_context);
     property_tree_builder_.UpdatePropertiesForSelf(
         object, *context.tree_builder_context);
   }
 
   paint_invalidator_.InvalidatePaint(object, context.tree_builder_context.get(),
                                      *context.paint_invalidator_context);
 
   if (context.tree_builder_context) {
     property_tree_builder_.UpdatePropertiesForChildren(
         object, *context.tree_builder_context);
@@ skipping 23 matching lines @@
       }
       Walk(*frame_view, context);
     }
     // TODO(pdr): Investigate RemoteFrameView (crbug.com/579281).
   }
 
   object.GetMutableForPainting().ClearPaintFlags();
 }
 
 }  // namespace blink