Remove caching of contents paint properties

third_party/WebKit/Source/core/paint/FindPropertiesNeedingUpdate.h

 // Copyright 2016 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.
 
 #ifndef FindPropertiesNeedingUpdate_h
 #define FindPropertiesNeedingUpdate_h
 
 #if DCHECK_IS_ON()
 
 #include "core/frame/FrameView.h"
@@ skipping 189 matching lines @@
                                 original_local_border_box_properties_->Clip(),
                                 object_border_box->Clip());
       DCHECK_OBJECT_PROPERTY_EQ(object_,
                                 original_local_border_box_properties_->Effect(),
                                 object_border_box->Effect());
     } else {
       DCHECK_EQ(!!original_local_border_box_properties_, !!object_border_box)
           << " Object: " << object_.DebugName();
     }
 
-    // Instead of checking that the contents properties are unchanged here,
-    // we check them on every access in LayoutObject::contentsProperties.
-
     // Restore original clean bit.
     object_.GetMutableForPainting().ClearNeedsPaintPropertyUpdateForTesting();
   }
 
  private:
   const LayoutObject& object_;
   bool needed_paint_property_update_;
   bool needed_forced_subtree_update_;
   LayoutPoint original_paint_offset_;
   std::unique_ptr<const ObjectPaintProperties> original_properties_;
   std::unique_ptr<const PropertyTreeState>
       original_local_border_box_properties_;
 };
 
 }  // namespace blink
 #endif  // DCHECK_IS_ON()
 
 #endif  // FindPropertiesNeedingUpdate_h