Bring up IPC in NaCl....

build/build_config.h

 // Copyright (c) 2006-2008 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.
 
 // This file adds defines about the platform we're currently building on.
 //  Operating System:
 //    OS_WIN / OS_MACOSX / OS_LINUX / OS_POSIX (MACOSX or LINUX)
 //  Compiler:
 //    COMPILER_MSVC / COMPILER_GCC
 //  Processor:
 //    ARCH_CPU_X86 / ARCH_CPU_X86_64 / ARCH_CPU_X86_FAMILY (X86 or X86_64)
 //    ARCH_CPU_32_BITS / ARCH_CPU_64_BITS
 
 #ifndef BUILD_BUILD_CONFIG_H_
 #define BUILD_BUILD_CONFIG_H_
 
 // A set of macros to use for platform detection.
 #if defined(__APPLE__)
 #define OS_MACOSX 1
+#elif defined(__native_client__)
+#define OS_NACL 1
 #elif defined(__linux__)
 #define OS_LINUX 1
 // Use TOOLKIT_GTK on linux if TOOLKIT_VIEWS isn't defined.
 #if !defined(TOOLKIT_VIEWS)
 #define TOOLKIT_GTK
 #endif
 #elif defined(_WIN32)
 #define OS_WIN 1
 #define TOOLKIT_VIEWS 1
 #elif defined(__FreeBSD__)
@@ skipping 23 matching lines @@
 #define USE_X11 1  // Use X for graphics.
 #endif
 
 #if defined(USE_OPENSSL) && defined(USE_NSS)
 #error Cannot use both OpenSSL and NSS
 #endif
 
 // For access to standard POSIXish features, use OS_POSIX instead of a
 // more specific macro.
 #if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) || \
-    defined(OS_OPENBSD) || defined(OS_SOLARIS)
+    defined(OS_OPENBSD) || defined(OS_SOLARIS) || defined(OS_NACL)
 #define OS_POSIX 1
 // Use base::DataPack for name/value pairs.
 #define USE_BASE_DATA_PACK 1
 #endif
 
 // Use tcmalloc
 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(NO_TCMALLOC)
 #define USE_TCMALLOC 1
 #endif
 
@@ skipping 45 matching lines @@
 // On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
 // compile in this mode (in particular, Chrome doesn't). This is intended for
 // other projects using base who manage their own dependencies and make sure
 // short wchar works for them.
 #define WCHAR_T_IS_UTF16
 #else
 #error Please add support for your compiler in build/build_config.h
 #endif
 
 #endif  // BUILD_BUILD_CONFIG_H_