Replace PP_ALLOW_THIS_IN_INITIALIZER_LIST macro

ppapi/api/pp_macros.idl

 /* 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.
  */
 
 /**
  * Defines the API ...
  */
 
 #inline c
@@ skipping 68 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(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
+
 /**
  * @}
  * End of addtogroup PP
  */
 
 #endinl