WebCore: Remove PLATFORM(WIN) files we do not use.

Source/WebCore/platform/win/StructuredExceptionHandlerSupressor.h

-/*
- * Copyright (C) 2011 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.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
- */
-
-#ifndef StructuredExceptionHandlerSupressor_h
-#define StructuredExceptionHandlerSupressor_h
-
-namespace WebCore {
-
-#pragma warning(push)
-#pragma warning(disable: 4733) // Disable "not registered as safe handler" warning
-
-class StructuredExceptionHandlerSupressor {
-    WTF_MAKE_NONCOPYABLE(StructuredExceptionHandlerSupressor);
-public:
-    StructuredExceptionHandlerSupressor()
-    {
-        // Windows puts an __try/__except block around some calls, such as hooks.
-        // The exception handler then ignores system exceptions like invalid addresses
-        // and null pointers. This class can be used to remove this block and prevent
-        // it from catching the exception. Typically this will cause the exception to crash 
-        // which is often desirable to allow crashlogs to be recorded for debugging purposed.
-        // While this class is in scope we replace the Windows exception handler with 0xffffffff, 
-        // which indicates that the exception should not be handled.
-        //
-        // See http://www.microsoft.com/msj/0197/Exception/Exception.aspx
-
-        // Windows doesn't like assigning to member variables, so we need to get the value into
-        // a local variable and store it afterwards.
-        void* registration;
-
-        __asm mov eax, FS:[0]
-        __asm mov [registration], eax
-        __asm mov eax, 0xffffffff
-        __asm mov FS:[0], eax
-
-        m_savedExceptionRegistration = registration;
-    }
-
-    ~StructuredExceptionHandlerSupressor()
-    {
-        // Restore the exception handler
-        __asm mov eax, [m_savedExceptionRegistration]
-        __asm mov FS:[0], eax
-    }
-
-private:
-    void* m_savedExceptionRegistration;
-};
-
-#pragma warning(pop)
-
-} // namespace WebCore
-
-#endif // StructuredExceptionHandlerSupressor_h