mac: Remove IsOSSnowLeopard().

content/common/common.sb

 ;;
 ;; 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.
 ;;
 ; This configuration file isn't used on it's own, but instead implicitly
 ; included at the start of all other sandbox configuration files in Chrome.
 (version 1)
 
 ; Helper function to check if a param is set to true.
 (define (param-true? str) (string=? (param str) "TRUE"))
 
 ; Helper function to determine if a parameter is defined or not.
 (define (param-defined? str) (string? (param str)))
 
 ; Define constants for all of the parameter strings passed in.
 (define disable-sandbox-denial-logging "DISABLE_SANDBOX_DENIAL_LOGGING")
 (define enable-logging "ENABLE_LOGGING")
-(define component-build-workaround "COMPONENT_BUILD_WORKAROUND")
 (define permitted-dir "PERMITTED_DIR")
 (define homedir-as-literal "USER_HOMEDIR_AS_LITERAL")
 (define lion-or-later "LION_OR_LATER")
 (define elcap-or-later "ELCAP_OR_LATER")
 
 ; Consumes a subpath and appends it to the user's homedir path.
 (define (user-homedir-path subpath) (string-append (param homedir-as-literal) subpath))
 
 ; DISABLE_SANDBOX_DENIAL_LOGGING turns off log messages in the system log.
 (if (param-true? disable-sandbox-denial-logging)
@@ skipping 13 matching lines @@
 (allow file-read*
     (regex #"^/System/Library/Frameworks($|/)")
     (regex #"^/System/Library/PrivateFrameworks($|/)")
     (regex #"^/System/Library/CoreServices($|/)"))
 
 (allow ipc-posix-shm)
 
 ; Allow direct access to /dev/urandom, similar to Linux/POSIX, to allow
 ; third party code (eg: bits of Adobe Flash and NSS) to function properly.
 (allow file-read-data file-read-metadata (literal "/dev/urandom"))
-
-; Enables reading file metadata for the Chrome bundle and its parent paths.
-; https://crbug.com/127465
-(if (and (param-defined? component-build-workaround)
-         (param-true? component-build-workaround))
-  (allow file-read-metadata ))