Remove support for overriding write_pkg_info.

build/config/ios/rules.gni

 # Copyright 2015 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.
 
 import("//build/config/ios/ios_sdk.gni")
 import("//build/config/mac/base_rules.gni")
 import("//build/config/mac/symbols.gni")
 import("//build/toolchain/toolchain.gni")
 
 # Invokes lipo on multiple arch-specific binaries to create a fat binary.
@@ skipping 402 matching lines @@
 #       default to ios_enable_code_signing if not defined.
 #
 # For more information, see "gn help executable".
 template("ios_app_bundle") {
   _output_name = target_name
   _target_name = target_name
   if (defined(invoker.output_name)) {
     _output_name = invoker.output_name
   }
 
-  if (defined(invoker.write_pkg_info)) {
-    # TODO(sdefresne): remove once all downstream target have been fixed to
-    # not override this variable anymore.
-    assert(invoker.write_pkg_info, "write_pkg_info cannot be overridden")
-  }
-
   _arch_executable_source = _target_name + "_arch_executable_sources"
   _arch_executable_target = _target_name + "_arch_executable"
   _lipo_executable_target = _target_name + "_executable"
 
   source_set(_arch_executable_source) {
     forward_variables_from(invoker,
                            "*",
                            [
                              "bundle_deps",
                              "bundle_deps_filter",
@@ skipping 1021 matching lines @@
       "-rpath",
       "-Xlinker",
       "@loader_path/Frameworks",
     ]
   }
 }
 
 set_defaults("ios_xctest_test") {
   configs = default_executable_configs
 }