Make compositing updates 30.7% faster for calculator

Source/core/rendering/RenderGeometryMap.cpp

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 152 matching lines @@
     }
 
 #if !ASSERT_DISABLED
     if (m_mapping.size() > 0) {
         const RenderObject* lastRenderer = m_mapping.last().m_renderer;
         const RenderLayer* layer = lastRenderer->enclosingLayer();
 
         // Bounds for invisible layers are intentionally not calculated, and are
         // therefore not necessarily expected to be correct here. This is ok,
         // because they will be recomputed if the layer becomes visible.
-        if (!layer || !layer->subtreeIsInvisible()) {
+        if (!layer->subtreeIsInvisible() && lastRenderer->style()->visibility() == VISIBLE) {
             FloatRect rendererMappedResult = lastRenderer->localToContainerQuad(rect, container, m_mapCoordinatesFlags).boundingBox();
 
             // Inspector creates renderers with negative width <https://bugs.webkit.org/show_bug.cgi?id=87194>.
             // Taking FloatQuad bounds avoids spurious assertions because of that.
             ASSERT(enclosingIntRect(rendererMappedResult) == enclosingIntRect(FloatQuad(result).boundingBox()));
         }
     }
 #endif
 
     return result;
@@ skipping 153 matching lines @@
     // If we're not working with multiple RenderViews, then any view is considered
     // "topmost" (to preserve original behavior).
     if (!(m_mapCoordinatesFlags & TraverseDocumentBoundaries))
         return true;
 
     return renderer->frame()->isMainFrame();
 }
 #endif
 
 } // namespace WebCore