Add support for Mac/iOS application bundles to GN tool.

testing/test.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.
 
 # ==============================================================================
 # TEST SETUP
 # ==============================================================================
 
 # Define a test as an executable (or apk on Android) with the "testonly" flag
 # set.
@@ skipping 105 matching lines @@
     group("${target_name}_incremental") {
       testonly = true
       datadeps = [
         ":$incremental_test_runner_script_name",
       ]
       deps = [
         ":${apk_name}_incremental",
       ]
     }
   } else if (is_ios) {
-    if (is_ios) {
-      import("//build/config/ios/rules.gni")
-    }
+    import("//build/config/ios/rules.gni")
+    ios_test_app(target_name) {
+      forward_variables_from(invoker, "*")
 
-    ios_app(target_name) {
-      # TODO(GYP): Make this configurable and only provide a default
-      # that can be overridden.
-      info_plist = "//testing/gtest_ios/unittest-Info.plist"
-      app_name = target_name
-      entitlements_path = "//testing/gtest_ios"
-      code_signing_identity = ""
-      testonly = true
-
-      # See above call.
-      set_sources_assignment_filter([])
-
-      forward_variables_from(invoker,
-                             [
-                               "all_dependent_configs",
-                               "allow_circular_includes_from",
-                               "cflags",
-                               "cflags_c",
-                               "cflags_cc",
-                               "cflags_objc",
-                               "cflags_objcc",
-                               "check_includes",
-                               "configs",
-                               "data",
-                               "data_deps",
-                               "defines",
-                               "include_dirs",
-                               "ldflags",
-                               "libs",
-                               "output_extension",
-                               "output_name",
-                               "public",
-                               "public_configs",
-                               "public_deps",
-                               "sources",
-                               "visibility",
-                             ])
-
-      if (defined(invoker.deps)) {
-        deps = invoker.deps
-      } else {
+      if (!defined(invoker.deps)) {
         deps = []
       }
+
       deps += [
         # All shared libraries must have the sanitizer deps to properly link in
         # asan mode (this target will be empty in other cases).
         "//build/config/sanitizers:deps",
       ]
     }
   } else {
     executable(target_name) {
       forward_variables_from(invoker, "*")
 
       testonly = true
 
       if (!defined(invoker.deps)) {
         deps = []
       }
       deps += [
         # All shared libraries must have the sanitizer deps to properly link in
         # asan mode (this target will be empty in other cases).
         "//build/config/sanitizers:deps",
 
         # Give tests the default manifest on Windows (a no-op elsewhere).
         "//build/win:default_exe_manifest",
       ]
     }
   }
 }