Remove all of WebCore/platform/mac which is not mentioned in WebCore.gypi.

Source/WebCore/platform/mac/WebCoreObjCExtras.h

-/*
- * Copyright (C) 2007 Apple 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:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer. 
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution. 
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, 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.
- */
-
-#include <CoreFoundation/CFBase.h>
-#include <objc/objc.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Use WebCFAutorelease to return an object made by a CoreFoundation
-// "create" or "copy" function as an autoreleased and garbage collected
-// object. CF objects need to be "made collectable" for autorelease to work
-// properly under GC.
-static inline id WebCoreCFAutorelease(CFTypeRef obj)
-{
-    if (obj)
-        CFMakeCollectable(obj);
-    [(id)obj autorelease];
-    return (id)obj;
-}
-
-void WebCoreObjCFinalizeOnMainThread(Class cls);
-
-// The 'Class' that should be passed in here is the class of the
-// object that implements the dealloc method that this function is called from.
-bool WebCoreObjCScheduleDeallocateOnMainThread(Class cls, id object);
-
-#ifdef __cplusplus
-}
-#endif