Replace PP_ALLOW_THIS_IN_INITIALIZER_LIST macro

ppapi/tests/test_utils.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_TESTS_TEST_UTILS_H_
 #define PPAPI_TESTS_TEST_UTILS_H_
 
 #include <string>
 
 #include "ppapi/c/dev/ppb_testing_dev.h"
@@ skipping 61 matching lines @@
 #else
 #error Please add support for your platform in ppapi/c/pp_macros.h.
 #endif
 
 /* These are used to determine POSIX-like implementations vs Windows. */
 #if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
     defined(__OpenBSD__) || defined(__sun) || defined(__native_client__)
 #define PPAPI_POSIX 1
 #endif
 
-// This is roughly copied from base/compiler_specific.h, and makes it possible
-// to pass 'this' in a constructor initializer list, when you really mean it.
-//
-// Example usage:
-// Foo::Foo(MyInstance* instance)
-//     : ALLOW_THIS_IN_INITIALIZER_LIST(callback_factory_(this)) {}
-#if defined(COMPILER_MSVC)
-#define PP_ALLOW_THIS_IN_INITIALIZER_LIST(code) \
-    __pragma(warning(push)) \
-    __pragma(warning(disable:4355)) \
-    code \
-    __pragma(warning(pop))
-#else
-#define PP_ALLOW_THIS_IN_INITIALIZER_LIST(code) code
-#endif
-
 #endif  // PPAPI_TESTS_TEST_UTILS_H_