Currently we only composite fixed position elements if we are on High DPI devices. This fix allows …

Source/core/paint/DeprecatedPaintLayer.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 2303 matching lines @@
         return false;
 
     // We can't use hasVisibleContent(), because that will be true if our layoutObject is hidden, but some child
     // is visible and that child doesn't cover the entire rect.
     if (layoutObject()->style()->visibility() != VISIBLE)
         return false;
 
     if (paintsWithFilters() && layoutObject()->style()->filter().hasFilterThatAffectsOpacity())
         return false;
 
-    // FIXME: Handle simple transforms.
-    if (paintsWithTransform(GlobalPaintNormalPhase))
-        return false;
-
     // FIXME: Remove this check.
     // This function should not be called when layer-lists are dirty.
     // It is somehow getting triggered during style update.
     if (m_stackingNode->zOrderListsDirty())
         return false;
 
     // FIXME: We currently only check the immediate layoutObject,
     // which will miss many cases.
     if (layoutObject()->backgroundIsKnownToBeOpaqueInRect(localRect))
         return true;
@@ skipping 373 matching lines @@
 
 void showLayerTree(const blink::LayoutObject* layoutObject)
 {
     if (!layoutObject) {
         fprintf(stderr, "Cannot showLayerTree. Root is (nil)\n");
         return;
     }
     showLayerTree(layoutObject->enclosingLayer());
 }
 #endif