Position overflow controls during layout.

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 242 matching lines @@
         // FIXME: Remove incremental compositing updates after fixing the chicken/egg issues
         // https://code.google.com/p/chromium/issues/detail?id=343756
         DisableCompositingQueryAsserts disabler;
         bool needsPaginationUpdate = isPaginated() || enclosingPaginationLayer();
         updatePaginationRecursive(needsPaginationUpdate);
     }
 }
 
 void RenderLayer::updateLayerPositionRecursive()
 {
-    if (hasOverflowControls()) {
-        // FIXME: We should figure out the right time to position the overflow controls.
-        // This call appears to be necessary to pass some layout test that use EventSender,
-        // presumably because the normal time to position the controls is during paint. We
-        // probably shouldn't position the overflow controls during paint either...
-        DisableCompositingQueryAsserts disabler;
-        scrollableArea()->positionOverflowControls(IntSize());
-    }
-
     if (m_reflectionInfo)
         m_reflectionInfo->reflection()->layout();
 
     // FIXME: We should be able to remove this call because we don't care about
     // any descendant-dependent flags, but code somewhere else is reading these
     // flags and depending on us to update them.
     updateDescendantDependentFlags();
 
     for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
         child->updateLayerPositionRecursive();
@@ skipping 3463 matching lines @@
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif