[Mac/GN] Allow the info_plist template caller to specify the plist format.

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")
 
 if (is_mac) {
   import("//build/config/mac/mac_sdk.gni")
 } else if (is_ios) {
   import("//build/config/mac/ios_sdk.gni")
 }
 
 # The base template used to generate Info.plist files for iOS and Mac apps and
 # frameworks.
 #
 # Arguments
 #
 #     plist_templates:
 #         string array, paths to plist files which will be used for the bundle.
 #
 #     executable_name:
 #         string, name of the generated target used for the product
 #         and executable name as specified in the output Info.plist.
 #
+#     format:
+#         string, the format to `plutil -convert` the plist to when
+#         generating the output.
+#
 #     extra_substitutions:
 #         (optional) string array, 'key=value' pairs for extra fields which are
 #         specified in a source Info.plist template.
 template("info_plist") {
   assert(defined(invoker.plist_templates),
          "A list of template plist files must be specified for $target_name")
   assert(defined(invoker.executable_name),
          "The executable_name must be specified for $target_name")
+  assert(defined(invoker.format),
+         "The plist format must be specified for $target_name")
   executable_name = invoker.executable_name
 
   action(target_name) {
     script = "//build/config/mac/gen_plist.py"
     sources = invoker.plist_templates
     outputs = [
       "$target_gen_dir/$target_name.plist",
     ]
     extra_args = []
     if (defined(invoker.extra_substitutions)) {
       foreach(substitution, invoker.extra_substitutions) {
         extra_args += [ "-s=$substitution" ]
       }
     }
     response_file_contents =
         extra_args + [
           "-s=BUILD_MACHINE_OS_BUILD=$machine_os_build",
           "-s=EXECUTABLE_NAME=$executable_name",
           "-s=GCC_VERSION=com.apple.compilers.llvm.clang.1_0",
           "-s=PRODUCT_NAME=$executable_name",
           "-s=XCODE_BUILD=$xcode_build",
           "-s=XCODE_VERSION=$xcode_version",
           "-o=" + rebase_path(outputs[0], root_build_dir),
+          "-f=" + invoker.format,
         ] + rebase_path(sources, root_build_dir)
     args = [ "@{{response_file_name}}" ]
   }
 }
 
 # This is used as the base template for both iOS and Mac frameworks.
 #
 # By default, the bundle target this template generates does not link the
 # resulting framework into anything that depends on it. If a dependency wants
 # a link-time (as well as build-time) dependency on the framework bundle,
@@ skipping 237 matching lines @@
       "$target_gen_dir/{{source_name_part}}.nib",
     ]
     args = [
              "--input",
              "{{source}}",
              "--output",
              rebase_path("$target_gen_dir/{{source_name_part}}.nib"),
            ] + ibtool_flags
   }
 }