Fix deps in all BUILD.gn files in ios.

ios/chrome/share_extension/BUILD.gn

 # 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.
 
 import("//build/config/ios/rules.gni")
 import("//build/config/locales.gni")
 import("//build/config/mac/base_rules.gni")
 import("//build/mac/tweak_info_plist.gni")
 import("//ios/build/chrome_build.gni")
 import("//ios/chrome/extension_repack.gni")
@@ skipping 58 matching lines @@
     "CHROMIUM_SHORT_NAME=$chromium_short_name",
     "SHARE_EXTENSION_BUNDLE_ID=$chromium_bundle_id.ShareExtension",
   ]
 
   entitlements_target = ":entitlements"
   info_plist_target = ":tweak_info_plist"
 }
 
 generate_localizable_strings("system_strings") {
   visibility = [ ":*" ]
-  _packed_resources_target = "//ios/chrome/share_extension:packed_resources"
+  _packed_resources_target = ":packed_resources"
   config_file = "share_extension_localize_strings_config.plist"
   datapack_dir = get_label_info(_packed_resources_target, "target_gen_dir")
   packed_locales = ios_packed_locales_as_mac_outputs
   output_filenames = [ "Localizable.strings" ]
   deps = [
     _packed_resources_target,
   ]
 }