Fix build with disabled NaCl glibc toolchain.

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 1000 matching lines @@
           'NACL_WIN64',
         ],
       }],
 
       ['os_posix==1 and chromeos==0 and OS!="android"', {
         'use_cups%': 1,
       }, {
         'use_cups%': 0,
       }],
 
+      # Native Client glibc toolchain is enabled by default except on arm.
+      ['target_arch=="arm"', {
+        'disable_glibc%': 1,
+      }, {
+        'disable_glibc%': 0,
+      }],
+
       # Set the relative path from this file to the GYP file of the JPEG
       # library used by Chromium.
       ['use_libjpeg_turbo==1', {
         'libjpeg_gyp_path': '../third_party/libjpeg_turbo/libjpeg.gyp',
       }, {
         'libjpeg_gyp_path': '../third_party/libjpeg/libjpeg.gyp',
       }],  # use_libjpeg_turbo==1
 
       # Options controlling the use of GConf (the classic GNOME configuration
       # system) and GIO, which contains GSettings (the new GNOME config system).
@@ skipping 2103 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }