Build the browser IRT shim with nacl-clang instead of biased bitcode.

ppapi/native_client/src/untrusted/pnacl_irt_shim/pnacl_irt_shim.gyp

 # 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.
 
 {
   'includes': [
     '../../../../../native_client/build/untrusted.gypi',
   ],
   'targets': [
     {
       # The full library, which PNaCl uses for offline .pexe -> .nexe.
       # We keep the target names in this file short to avoid having really long
       # path names on Windows.
       # https://code.google.com/p/nativeclient/issues/detail?id=3846
       'target_name': 'aot',
       'type': 'none',
       'variables': {
         'nlib_target': 'libpnacl_irt_shim.a',
         'out_pnacl_newlib_arm': '>(tc_lib_dir_pnacl_translate)/lib-arm/>(nlib_target)',
         'out_pnacl_newlib_x86_32': '>(tc_lib_dir_pnacl_translate)/lib-x86-32/>(nlib_target)',
         'out_pnacl_newlib_x86_64': '>(tc_lib_dir_pnacl_translate)/lib-x86-64/>(nlib_target)',
         'out_pnacl_newlib_mips': '>(tc_lib_dir_pnacl_translate)/lib-mips32/>(nlib_target)',
         # TODO(hidehiko): When crrev.com/524573002 is submitted and NaCl
         # repository is rolled out with the CL, then we can simply remove this
         # variable, as it is no longer used.
         'out_pnacl_newlib_x86_32_nonsfi': '>(tc_lib_dir_pnacl_translate)/lib-x86-32-nonsfi/>(nlib_target)',
         'out_newlib32_nonsfi': '>(tc_lib_dir_pnacl_translate)/lib-x86-32-nonsfi/>(nlib_target)',
         'out_pnacl_newlib_arm_nonsfi': '>(tc_lib_dir_pnacl_translate)/lib-arm-nonsfi/>(nlib_target)',
         'out_newlib_arm_nonsfi': '>(tc_lib_dir_pnacl_translate)/lib-arm-nonsfi/>(nlib_target)',
-        'build_glibc': 0,
-        'build_newlib': 0,
         'build_pnacl_newlib': 1,
         'pnacl_native_biased': 1,

[Derek Schuff, 2016/02/09 22:58:34]

This target is just used by the SDK, right?

         'enable_x86_32': 1,
         'enable_x86_64': 1,
         'enable_arm': 1,
         'enable_mips': 1,
         'enable_x86_32_nonsfi': 1,
         'enable_arm_nonsfi': 1,
         'sources': [
           'irt_shim_ppapi.c',
           'pnacl_shim.c',
           'shim_entry.c',
@@ skipping 14 matching lines @@
     # If we ever change that hook interface or change the in-IRT shim's ABI,
     # we would need to clear the translation cache to match the new IRT.
     {
       'target_name': 'browser',
       'type': 'none',
       'variables': {
         # Use a different name from the AOT variant. Have the
         # pnacl_support_extension rename this to the canonical name when
         # copying to the final target directory.
         'nlib_target': 'libpnacl_irt_shim_browser.a',
-        'out_pnacl_newlib_arm': '>(tc_lib_dir_pnacl_translate)/lib-arm/>(nlib_target)',
-        'out_pnacl_newlib_x86_32': '>(tc_lib_dir_pnacl_translate)/lib-x86-32/>(nlib_target)',
-        'out_pnacl_newlib_x86_64': '>(tc_lib_dir_pnacl_translate)/lib-x86-64/>(nlib_target)',
-        'out_pnacl_newlib_mips': '>(tc_lib_dir_pnacl_translate)/lib-mips32/>(nlib_target)',
-        'build_glibc': 0,
-        'build_newlib': 0,
-        'build_pnacl_newlib': 1,
-        'pnacl_native_biased': 1,
-        'enable_x86_32': 1,
-        'enable_x86_64': 1,
-        'enable_arm': 1,
-        'enable_mips': 1,
+        'build_newlib': 1,
         'sources': [
           'shim_entry.c',
           'shim_ppapi.c',
         ],
         'extra_args': [
           '--strip-debug',
         ],
       },
     },
     {
@@ skipping 10 matching lines @@
         # output library directories match the IRT linking search paths.
         'build_irt': 1,
         'sources': [
           'irt_shim_ppapi.c',
           'pnacl_shim.c',
         ],
       },
     },
   ],
 }