Make the compositing assert disabler for paint invalidation more targeted.

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 1277 matching lines @@
 
     return oldChild;
 }
 
 void RenderLayer::removeOnlyThisLayer()
 {
     if (!m_parent)
         return;
 
     m_clipper.clearClipRectsIncludingDescendants();
+
+    // For querying RenderLayer::compositingState()
+    // Eager invalidation here is correct, since we are invalidating with respect to the previous frame's
+    // compositing state when removing the layer.
+    DisableCompositingQueryAsserts disabler;
     paintInvalidator().paintInvalidationIncludingNonCompositingDescendants();
 
     RenderLayer* nextSib = nextSibling();
 
     // Remove the child reflection layer before moving other child layers.
     // The reflection layer should not be moved to the parent.
     if (m_reflectionInfo)
         removeChild(m_reflectionInfo->reflectionLayer());
 
     // Now walk our kids and reattach them to our parent.
@@ skipping 2396 matching lines @@
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif