[iOS/Mac/GN] Split out common iOS and Mac rules into base_rules.gni.

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")
+import("//build/config/mac/base_rules.gni")
 
+# Generates Info.plist files for Mac apps and frameworks.
+#
+# Arguments
+#
+#     info_plist:
+#         string, the path to an plist file that will be included in the final
+#         Info.plist generated.
+#
+#     executable_name:
+#         string, name of the generated target used for the product
+#         and executable name as specified in the output Info.plist.
+#
+#     extra_substitutions:
+#         (optional) string array, 'key=value' pairs for extra fields which are
+#         specified in a source Info.plist template.
 template("ios_info_plist") {
   info_plist(target_name) {
     extra_substitutions = []
     if (defined(invoker.extra_substitutions)) {
       extra_substitutions = invoker.extra_substitutions
     }
     extra_substitutions += [
       "IOS_DEPLOYMENT_TARGET=$ios_deployment_target",
       "IOS_PLATFORM_BUILD=$ios_platform_build",
       "IOS_PLATFORM_NAME=$ios_sdk_name",
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     ]
   }
 }
 
 # Template to package a shared library into an iOS framework bundle.
 #
 # This template provides two targets to control whether the framework is
 # merely built when targets depend on it, or whether it is linked as well:
 # "$target_name" and "$target_name+link".
 #
-# See the //build/config/mac/rules.gni:framework_bundle for a discussion
+# See the //build/config/mac/base_rules.gni:framework_bundle for a discussion
 # and examples.
 #
 # 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
@@ skipping 168 matching lines @@
                              [
                                "testonly",
                                "visibility",
                              ])
       public_deps = [
         ":$_framework_target+link",
       ]
     }
   }
 }