Don't apply device pixel ratio to filter params, either shorthand or reference. We will take c…

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 3915 matching lines @@
 {
     const FilterOperations& filters = style->filter();
     if (filters.hasReferenceFilter()) {
         for (size_t i = 0; i < filters.size(); ++i) {
             FilterOperation* filterOperation = filters.operations().at(i).get();
             if (filterOperation->type() != FilterOperation::REFERENCE)
                 continue;
             ReferenceFilterOperation* referenceOperation = toReferenceFilterOperation(filterOperation);
             // FIXME: Cache the ReferenceFilter if it didn't change.
             RefPtr<ReferenceFilter> referenceFilter = ReferenceFilter::create();
+#ifdef BLINK_SCALE_FILTERS_AT_RECORD_TIME
             float zoom = style->effectiveZoom() * WebCore::deviceScaleFactor(renderer()->frame());
+#else
+            float zoom = style->effectiveZoom();
+#endif
             referenceFilter->setAbsoluteTransform(AffineTransform().scale(zoom, zoom));
             referenceFilter->setLastEffect(ReferenceFilterBuilder::build(referenceFilter.get(), renderer(), referenceFilter->sourceGraphic(),
                 referenceOperation));
             referenceOperation->setFilter(referenceFilter.release());
         }
     }
 
     return filters;
 }
 
@@ skipping 116 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif