[iOS/OSX] Refactor mac_framework so that it can be shared with iOS.

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/rules.gni")
 
 # TODO(crbug.com/297668): refactor this template to extract common behaviour
 # between OS X and iOS bundle generation, then create a generic "app" template
 # that forward to "executable" on all platform except iOS/OS X.
 
 # Template to build an application bundle for iOS.
 #
 # This should be used instead of "executable" built-in target type on iOS.
 # As the template forward the generation of the application executable to
 # an "executable" target, all arguments supported by "executable" targets
 # are also supported by this template.
 #
 # Arguments
 #
 #   output_name:
 #       (optional) string, name of the generated application, if omitted,
 #       defaults to the target_name.
 #
 #   extra_substitutions:
 #       (optional) list of string in "key=value" format, each value will
 #       be used as an additional variable substitution rule when generating
 #       the application Info.plist
 #
 #   info_plist:
 #       path to the template to use to generate the application Info.plist
 #       by performing variable substitutions.
 #
 # For more information, see "gn help executable".
-template("app") {
+template("ios_app_bundle") {
   assert(defined(invoker.info_plist),
          "info_plist must be specified for target $target_name")
 
   _output_name = target_name
   _target_name = target_name
   if (defined(invoker.output_name)) {
     _output_name = invoker.output_name
   }
 
   _generate_info_plist = target_name + "_generate_info_plist"
@@ skipping 178 matching lines @@
 
     sources = [
       "$target_gen_dir/$_nib_filename/objects.nib",
       "$target_gen_dir/$_nib_filename/runtime.nib",
     ]
     outputs = [
       "{{bundle_resources_dir}}/$_nib_filename/{{source_file_part}}",
     ]
   }
 }
+
+# Template to package a shared library into an iOS framework bundle.
+#
+# Arguments
+#
+#     output_name:
+#         (optional) string, name of the generated framework without the
+#         .framework suffix. If omitted, defaults to target_name.
+#
+#     framework_version:
+#         (optional) string, version of the framework. Typically this is a
+#         single letter, like "A". If omitted, the Versions/ subdirectory
+#         structure will not be created, and build output will go directly
+#         into the framework subdirectory.
+#
+# See "gn help shared_library" for more information on arguments supported
+# by shared library target.
+template("ios_framework_bundle") {
+  framework_bundle(target_name) {
+    forward_variables_from(invoker, "*")
+  }
+}