PPAPI: Remove PP_ALLOW_THIS_IN_INITIALIZER_LIST

ppapi/c/pp_macros.h

 /* Copyright (c) 2012 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.
  */
 
 /* From pp_macros.idl modified Tue May 20 17:13:23 2014. */
 
 #ifndef PPAPI_C_PP_MACROS_H_
 #define PPAPI_C_PP_MACROS_H_
 
@@ skipping 77 matching lines @@
 
 /* PP_COMPILE_ASSERT_ENUM_SIZE_IN_BYTES is for typenames that contain 'enum'
    in C.  That is, enum names that are not typedefs.
    E.g.:
    enum Bar { A = 0, B = 1 };
    PP_COMPILE_ASSERT_ENUM_SIZE_IN_BYTES(Foo, 4);
  */
 #define PP_COMPILE_ASSERT_ENUM_SIZE_IN_BYTES(NAME, SIZE) \
 PP_COMPILE_ASSERT_SIZE_IN_BYTES_IMPL(NAME, enum NAME, SIZE)
 
-/* 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.
-   E.g.:
-   Foo::Foo(MyInstance* instance)
-       : PP_ALLOW_THIS_IN_INITIALIZER_LIST(callback_factory_(this)) {}
- */
-#if defined(_MSC_VER)
-# 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
-
 /**
  * @}
  * End of addtogroup PP
  */
 
 #endif  /* PPAPI_C_PP_MACROS_H_ */