Remove the remainings of the following guards:

Source/core/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 29 matching lines @@
 #if OS(WINDOWS)
 
 #ifndef _WIN32_WINNT
 #define _WIN32_WINNT 0x0502
 #endif
 
 #ifndef WINVER
 #define WINVER 0x0502
 #endif
 
-#if !USE(CURL)
 #ifndef _WINSOCKAPI_
 #define _WINSOCKAPI_ // Prevent inclusion of winsock.h in windows.h
 #endif
-#endif
 
 // If we don't define these, they get defined in windef.h. 
 // We want to use std::min and std::max
 #ifdef __cplusplus
 #define max max
 #define min min
 #endif
 
 #else
 
@@ skipping 88 matching lines @@
 
 /* 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