Add support for iOS application bundle to GN.

testing/test.gni

Index: testing/test.gni
diff --git a/testing/test.gni b/testing/test.gni
index 6739bfebb21ce85f18903e934fe9822658d2f109..912648eb52c1bf6e25dba751d3a4ef8a066e2510 100644
--- a/testing/test.gni
+++ b/testing/test.gni
@@ -123,51 +123,84 @@ template("test") {
       ]
     }
   } else if (is_ios) {
-    if (is_ios) {
-      import("//build/config/ios/rules.gni")
-    }
-
-    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([])
+    import("//build/config/ios/ios_sdk.gni")
+    import("//build/config/ios/rules.gni")
 
+    ios_test_app(target_name) {
       forward_variables_from(invoker,
                              [
+                               # Arguments specific to ios_test_app target.
+                               "app_name",
+                               "code_signing_identity",
+                               "entitlements_path",
+                               "extra_substitutions",
+                               "info_plist",
+                               "test_data_files",
+
+                               # Arguments supported by executable target.
                                "all_dependent_configs",
                                "allow_circular_includes_from",
+                               "asmflags",
+                               "bundle_data",
                                "cflags",
                                "cflags_c",
                                "cflags_cc",
-                               "cflags_objc",
                                "cflags_objcc",
                                "check_includes",
                                "configs",
                                "data",
                                "data_deps",
                                "defines",
+                               "deps",
                                "include_dirs",
+                               "inputs",
                                "ldflags",
+                               "lib_dirs",
                                "libs",
                                "output_extension",
                                "output_name",
+                               "precompiled_header",
+                               "precompiled_source",
                                "public",
                                "public_configs",
                                "public_deps",
                                "sources",
                                "visibility",
                              ])
+      testonly = true
 
-      if (defined(invoker.deps)) {
-        deps = invoker.deps
-      } else {
+      _app_name = target_name
+      if (defined(invoker.app_name)) {
+        _app_name = invoker.app_name
+      }
+      _bundle_test_name = _app_name
+      if (defined(invoker.bundle_test_name)) {
+        _bundle_test_name = invoker.bundle_test_name
+      }
+
+      if (!defined(invoker.extra_substitutions)) {
+        extra_substitutions = []
+      }
+      extra_substitutions += [ "BUNDLE_ID_TEST_NAME=$_bundle_test_name" ]
+
+      if (!defined(invoker.bundle_data)) {
+        bundle_data = []
+      }
+      bundle_data += [ "//testing/gtest_ios/Default.png" ]
+
+      if (!defined(invoker.info_plist)) {
+        info_plist = "//testing/gtest_ios/unittest-Info.plist"
+      }
+
+      if (!defined(invoker.entitlements_path)) {
+        entitlements_path = ""
+      }
+
+      if (!defined(invoker.code_signing_identity)) {
+        code_signing_identity = ios_code_signing_identity
+      }
+
+      if (!defined(invoker.deps)) {

[brettw, 2016/01/22 19:00:12]

I'd make this:
  if (!defined(deps)) {
now.

[sdefresne, 2016/01/25 14:01:22]

Done.

         deps = []
       }
       deps += [