Removing a bunch of unused platform code.

Source/WTF/wtf/Platform.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  * Copyright (C) 2010, 2011 Research In Motion Limited. 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.
@@ skipping 415 matching lines @@
     || OS(QNX)              \
     || OS(SOLARIS)          \
     || defined(unix)        \
     || defined(__unix)      \
     || defined(__unix__)
 #define WTF_OS_UNIX 1
 #endif
 
 /* Operating environments */
 
-/* FIXME: these are all mixes of OS, operating environment and policy choices. */
-/* PLATFORM(CHROMIUM) */
-/* PLATFORM(QT) */
-/* PLATFORM(WX) */
-/* PLATFORM(GTK) */
-/* PLATFORM(BLACKBERRY) */
-/* PLATFORM(MAC) */
-/* PLATFORM(WIN) */
-#if defined(BUILDING_CHROMIUM__)
+/* FIXME: This should go away since we're only building chromium now */
 #define WTF_PLATFORM_CHROMIUM 1
-#elif defined(BUILDING_QT__)
-#define WTF_PLATFORM_QT 1
-#elif defined(BUILDING_WX__)
-#define WTF_PLATFORM_WX 1
-#elif defined(BUILDING_GTK__)
-#define WTF_PLATFORM_GTK 1
-#elif defined(BUILDING_BLACKBERRY__)
-#define WTF_PLATFORM_BLACKBERRY 1
-#elif OS(DARWIN)
-#define WTF_PLATFORM_MAC 1
-#elif OS(WINDOWS)
-#define WTF_PLATFORM_WIN 1
-#endif
 
 /* PLATFORM(IOS) */
 /* FIXME: this is sometimes used as an OS switch and sometimes for higher-level things */
 #if (defined(TARGET_OS_EMBEDDED) && TARGET_OS_EMBEDDED) || (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE)
 #define WTF_PLATFORM_IOS 1
 #endif
 
 /* PLATFORM(IOS_SIMULATOR) */
 #if defined(TARGET_IPHONE_SIMULATOR) && TARGET_IPHONE_SIMULATOR
 #define WTF_PLATFORM_IOS 1
@@ skipping 590 matching lines @@
 #if defined(QT_OPENGL_ES_2) && !defined(WTF_USE_OPENGL_ES_2)
 #define WTF_USE_OPENGL_ES_2 1
 #endif
 #endif
 
 #if !PLATFORM(IOS) && PLATFORM(MAC) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
 #define WTF_USE_CONTENT_FILTERING 1
 #endif
 
 #endif /* WTF_Platform_h */