Make classes and structures in core/layout fast-allocated.

Source/core/layout/svg/LayoutSVGResourcePaintServer.h

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. 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.
  */
 
 #ifndef LayoutSVGResourcePaintServer_h
 #define LayoutSVGResourcePaintServer_h
 
 #include "core/layout/svg/LayoutSVGResourceContainer.h"
 #include "platform/graphics/Color.h"
 #include "platform/graphics/Gradient.h"
 #include "platform/graphics/Pattern.h"
+#include "wtf/Allocator.h"
 
 class SkPaint;
 
 namespace blink {
 
 enum LayoutSVGResourceMode {
     ApplyToFillMode,
     ApplyToStrokeMode,
 };
 
 class LayoutObject;
 class LayoutSVGResourcePaintServer;
 class ComputedStyle;
 
 class SVGPaintServer {
+    STACK_ALLOCATED();
 public:
     explicit SVGPaintServer(Color);
     explicit SVGPaintServer(PassRefPtr<Gradient>);
     explicit SVGPaintServer(PassRefPtr<Pattern>);
 
     static SVGPaintServer requestForLayoutObject(const LayoutObject&, const ComputedStyle&, LayoutSVGResourceMode);
     static bool existsForLayoutObject(const LayoutObject&, const ComputedStyle&, LayoutSVGResourceMode);
 
     void applyToSkPaint(SkPaint&, float paintAlpha);
 
     static SVGPaintServer invalid() { return SVGPaintServer(Color(Color::transparent)); }
     bool isValid() const { return m_color != Color::transparent; }
 
     bool isTransformDependent() const { return m_gradient || m_pattern; }
     void prependTransform(const AffineTransform&);
 
 private:
     RefPtr<Gradient> m_gradient;
     RefPtr<Pattern> m_pattern;
     Color m_color;
 };
 
 // If |SVGPaintDescription::hasFallback| is true, |SVGPaintDescription::color| is set to a fallback color.
 struct SVGPaintDescription {
+    STACK_ALLOCATED();
     SVGPaintDescription() : resource(nullptr), isValid(false), hasFallback(false) { }
     SVGPaintDescription(Color color) : resource(nullptr), color(color), isValid(true), hasFallback(false) { }
     SVGPaintDescription(LayoutSVGResourcePaintServer* resource) : resource(resource), isValid(true), hasFallback(false) { ASSERT(resource); }
     SVGPaintDescription(LayoutSVGResourcePaintServer* resource, Color fallbackColor) : resource(resource), color(fallbackColor), isValid(true), hasFallback(true) { ASSERT(resource); }
 
     LayoutSVGResourcePaintServer* resource;
     Color color;
     bool isValid;
     bool hasFallback;
 };
 
 class LayoutSVGResourcePaintServer : public LayoutSVGResourceContainer {
 public:
     LayoutSVGResourcePaintServer(SVGElement*);
     ~LayoutSVGResourcePaintServer() override;
 
     virtual SVGPaintServer preparePaintServer(const LayoutObject&) = 0;
 
     // Helper utilities used in to access the underlying resources for DRT.
     static SVGPaintDescription requestPaintDescription(const LayoutObject&, const ComputedStyle&, LayoutSVGResourceMode);
 };
 
 DEFINE_TYPE_CASTS(LayoutSVGResourcePaintServer, LayoutSVGResourceContainer, resource, resource->isSVGPaintServer(), resource.isSVGPaintServer());
 
 }
 
 #endif