Make classes and structures in core/xml, core/input, core/imagebitmap and core/Init fast-allocated.

Source/core/Init.h

 /*
  * Copyright (C) 2013 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 Init_h
 #define Init_h
 
 #include "core/CoreExport.h"
+#include "wtf/FastAllocBase.h"
 
 namespace blink {
 
 class CORE_EXPORT CoreInitializer {
+    WTF_MAKE_FAST_ALLOCATED(CoreInitializer);
 public:
     CoreInitializer() : m_isInited(false) { }
     // Should be called by clients before trying to create Frames.
     virtual void init();
 
     // FIXME: Why is this function static?
     static void shutdown();
 
 protected:
     bool isInitialized() const { return m_isInited; }
 
 private:
     void registerEventFactory();
 
     bool m_isInited;
 };
 
 } // namespace blink
 
 #endif // Init_h