Move Partition Allocator into Chromium base.

third_party/WebKit/Source/wtf/Compiler.h

 /*
  * Copyright (C) 2011, 2012 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
@@ skipping 47 matching lines @@
  * GCC_VERSION_AT_LEAST(4, 1, 0). */
 #define GCC_VERSION_AT_LEAST(major, minor, patch) 0
 #endif
 
 /* ==== Compiler features ==== */
 
 /* NEVER_INLINE */
 
 // TODO(palmer): Remove this and update callers to use NOINLINE from Chromium
 // base. https://bugs.chromium.org/p/chromium/issues/detail?id=632441
-//
-// For compatibility with callers in Blink:
 #define NEVER_INLINE NOINLINE
 
 /* WARN_UNUSED_RETURN */
 
+// TODO(palmer): Remove this and update callers to use WARN_UNUSED_RESULT from
+// Chromium base. https://bugs.chromium.org/p/chromium/issues/detail?id=632441
 #if COMPILER(GCC)
 #define WARN_UNUSED_RETURN __attribute__((warn_unused_result))
 #else
 #define WARN_UNUSED_RETURN
 #endif
 
 /* ALLOW_UNUSED_LOCAL */
 
 #define ALLOW_UNUSED_LOCAL(x) false ? (void)x : (void)0
 
@@ skipping 30 matching lines @@
 /* WTF_NON_EXPORTED_BASE; similar NON_EXPORTED_BASE in base/compiler_specific.h
  */
 
 #if COMPILER(MSVC)
 #define WTF_NON_EXPORTED_BASE(code) __pragma(warning(suppress : 4275)) code
 #else
 #define WTF_NON_EXPORTED_BASE(code) code
 #endif
 
 #endif /* WTF_Compiler_h */