Extend tweak_info_plist template to support multiple plist file as input.

ios/crnet/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/buildflag_header.gni")
 import("//build/config/ios/rules.gni")
 import("//build/config/mac/symbols.gni")
 import("//build/mac/tweak_info_plist.gni")
 import("//build/util/version.gni")
 import("//testing/test.gni")
@@ skipping 24 matching lines @@
   ]
 
   if (!use_platform_icu_alternatives) {
     deps += [ "//base:i18n" ]
   }
 }
 
 # Tweak |info_plist| with current version and revision.
 tweak_info_plist("tweak_crnet_plist") {
   info_plist = "Info.plist"
-  args = []
 }
 
 bundle_data("crnet_framework_resources") {
   # This bundle contains "Accept-Languages" header values for known locales.
   # TODO(mef): These strings should be auto-generated from chrome's .xtb
   # files, not hardcoded.
   sources = [
     "Resources/Localization/am.lproj",
     "Resources/Localization/ar.lproj",
     "Resources/Localization/bg.lproj",
@@ skipping 69 matching lines @@
 
   public_headers = [ "CrNet.h" ]
 
   sources = [
     "CrNet.h",
   ]
 
   configs -= [ "//build/config/compiler:default_symbols" ]
   configs += [ "//build/config/compiler:symbols" ]
 }