Make classes and structures in web fast-allocated.

Source/web/WebSettingsImpl.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebSettingsImpl_h
 #define WebSettingsImpl_h
 
 #include "public/web/WebSettings.h"
+#include "wtf/FastAllocBase.h"
 
 namespace blink {
 
 class DevToolsEmulator;
 class Settings;
 
 class WebSettingsImpl final : public WebSettings {
+    WTF_MAKE_FAST_ALLOCATED(WebSettingsImpl);
 public:
     WebSettingsImpl(Settings*, DevToolsEmulator*);
     virtual ~WebSettingsImpl() { }
 
     void setFromStrings(const WebString& name, const WebString& value) override;
 
     bool mainFrameResizesAreOrientationChanges() const override;
     bool shrinksViewportContentToFit() const override;
     int availablePointerTypes() const override;
     PointerType primaryPointerType() const override;
@@ skipping 179 matching lines @@
     // This quirk is to maintain compatibility with Android apps built on
     // the Android SDK prior to and including version 18. Presumably, this
     // can be removed any time after 2015. See http://crbug.com/313754.
     bool m_clobberUserAgentInitialScaleQuirk;
     bool m_mainFrameResizesAreOrientationChanges;
 };
 
 } // namespace blink
 
 #endif