Avoid calling imageForCurrentFrame needlessly on SVGImageForContainer

third_party/WebKit/Source/core/svg/graphics/SVGImageForContainer.cpp

 /*
  * Copyright (C) 2013 Google 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.
  */
 
 #include "core/svg/graphics/SVGImageForContainer.h"
 
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/FloatSize.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
+bool SVGImageForContainer::isTextureBacked()
+{
+    return m_image->isTextureBacked();
+}
+
 IntSize SVGImageForContainer::size() const
 {
     FloatSize scaledContainerSize(m_containerSize);
     scaledContainerSize.scale(m_zoom);
     return roundedIntSize(scaledContainerSize);
 }
 
 void SVGImageForContainer::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& dstRect,
     const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode)
 {
     m_image->drawForContainer(canvas, paint, m_containerSize, m_zoom, dstRect, srcRect, m_url);
 }
 
 void SVGImageForContainer::drawPattern(GraphicsContext& context, const FloatRect& srcRect, const FloatSize& scale,
     const FloatPoint& phase, SkXfermode::Mode op, const FloatRect& dstRect, const FloatSize& repeatSpacing)
 {
     m_image->drawPatternForContainer(context, m_containerSize, m_zoom, srcRect, scale, phase, op, dstRect, repeatSpacing, m_url);
 }
 
 PassRefPtr<SkImage> SVGImageForContainer::imageForCurrentFrame()
 {
     return m_image->imageForCurrentFrameForContainer(m_url);
 }
 
 } // namespace blink