Share the zygote's fopen overrides with nacl_helper.

content/content_browser.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.
 
 {
   'dependencies': [
     'browser/debugger/devtools_resources.gyp:devtools_resources',
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
@@ skipping 817 matching lines @@
         '../build/linux/system.gyp:fontconfig',
         '../build/linux/system.gyp:gtk',
         # For XShm* in backing_store_x.cc
         '../build/linux/system.gyp:x11',
         '../dbus/dbus.gyp:dbus',
       ],
     }],
     ['OS=="linux"', {
       'dependencies': [
         '../build/linux/system.gyp:udev',
+        '../sandbox/sandbox.gyp:libc_urandom_override',
       ],
       # Set LINUX_SANDBOX_PATH for Linux, including Chrome OS
       'conditions': [
         ['linux_sandbox_path != ""', {
           'defines': [
             'LINUX_SANDBOX_PATH="<(linux_sandbox_path)"',
           ],
         }],
       ],
     }],
@@ skipping 131 matching lines @@
       ],
     }],
     ['input_speech==0', {
       'sources/': [
         ['exclude', '^browser/speech/'],
       ],
     }],
   ],
 }