Correct iOS hermetic plist rule.

build/config/mac/base_rules.gni

 # Copyright 2016 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 contains rules that are shared between Mac and iOS.
 
 import("//build/toolchain/toolchain.gni")
 import("//build/config/mac/symbols.gni")
 
 if (is_mac) {
@@ skipping 35 matching lines @@
       invoker.output,
     ]
     args = [
       "plutil",
       "-convert",
       invoker.format,
       "-o",
       rebase_path(invoker.output, root_build_dir),
       rebase_path(invoker.source, root_build_dir),
     ]
+    if (!use_system_xcode) {

[erikchen, 2016/11/28 15:57:10]

Will this be parsed as an unknown argument if it isn't the first argument?

[justincohen, 2016/11/28 19:42:02]

It seems to work here?  I can move it to the front if you want.

+      args += [
+        "--developer_dir",
+        hermetic_xcode_path,
+      ]
+    }
   }
 }
 
 # Template to merge multiple plist files and perform variable substitutions.
 #
 # Arguments
 #
 #     plist_templates:
 #         string array, paths to plist files which will be used for the bundle.
 #
@@ skipping 166 matching lines @@
     ]
     if (!use_system_xcode) {
       args += [
         "--developer_dir",
         hermetic_xcode_path,
       ]
     }
     args += ibtool_flags
   }
 }