Remove Cairo support.

Source/WebCore/WebCorePrefix.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2013 Apple Inc.
  *
  * 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
@@ skipping 116 matching lines @@
 #include <sys/param.h>
 #endif
 #include <sys/stat.h>
 #if defined(__APPLE__)
 #include <sys/time.h>
 #include <sys/resource.h>
 #endif
 
 #if !PLATFORM(WX)
 #include <CoreFoundation/CoreFoundation.h>
-#if PLATFORM(WIN_CAIRO)
-#include <ConditionalMacros.h>
-#include <windows.h>
-#else
 
 #if OS(WINDOWS)
 #if USE(CG)
 // FIXME <rdar://problem/8208868> Remove support for obsolete ColorSync API, CoreServices header in CoreGraphics
 // We can remove this once the new ColorSync APIs are available in an internal Safari SDK.
 #include <ColorSync/ColorSync.h>
 #ifdef __COLORSYNCDEPRECATED__
 #define COREGRAPHICS_INCLUDES_CORESERVICES_HEADER
 #define OBSOLETE_COLORSYNC_API
 #endif
 #endif
 #if USE(CFNETWORK)
 /* Windows doesn't include CFNetwork.h via CoreServices.h, so we do
    it explicitly here to make Windows more consistent with Mac. */
 #include <CFNetwork/CFNetwork.h>
 #endif
 #include <windows.h>
 #else
 #if !PLATFORM(IOS)
 #include <CoreServices/CoreServices.h>
 #endif // !PLATFORM(IOS)
 #endif // OS(WINDOWS)
 
-#endif
 #endif // !PLATFORM(WX)
 
 #ifdef __OBJC__
 #if PLATFORM(IOS)
 #import <Foundation/Foundation.h>
 #else
 #import <Cocoa/Cocoa.h>
 #endif // PLATFORM(IOS)
 #endif
 
 #ifdef __cplusplus
 #define new ("if you use new/delete make sure to include config.h at the top of the file"()) 
 #define delete ("if you use new/delete make sure to include config.h at the top of the file"()) 
 #endif
 
 /* When C++ exceptions are disabled, the C++ library defines |try| and |catch|
  * to allow C++ code that expects exceptions to build. These definitions
  * interfere with Objective-C++ uses of Objective-C exception handlers, which
  * use |@try| and |@catch|. As a workaround, undefine these macros. */
 #ifdef __OBJC__
 #undef try
 #undef catch
 #endif