Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGMatrix.idl

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2006 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 [
     TypeChecking=Interface,
     ImplementedAs=SVGMatrixTearOff,
-    SetWrapperReferenceTo(SVGTransform contextTransform)
+    SetWrapperReferenceTo(SVGTransform contextTransform),
+    WillBeGarbageCollected,
 ] interface SVGMatrix {
     // FIXME: these attributes should all be floats but since we implement
     // AffineTransform with doubles setting these as doubles makes more sense.
     [RaisesException=Setter] attribute double a;
     [RaisesException=Setter] attribute double b;
     [RaisesException=Setter] attribute double c;
     [RaisesException=Setter] attribute double d;
     [RaisesException=Setter] attribute double e;
     [RaisesException=Setter] attribute double f;
 
     SVGMatrix multiply(SVGMatrix secondMatrix);
     [RaisesException] SVGMatrix inverse();
     SVGMatrix translate(float x, float y);
     SVGMatrix scale(float scaleFactor);
     SVGMatrix scaleNonUniform(float scaleFactorX, float scaleFactorY);
     SVGMatrix rotate(float angle);
     [RaisesException] SVGMatrix rotateFromVector(float x, float y);
     SVGMatrix flipX();
     SVGMatrix flipY();
     SVGMatrix skewX(float angle);
     SVGMatrix skewY(float angle);
 };