This CL adds support for extension in GYP.

test/ios/extension/ExtensionContainer/AppDelegate.m

Index: test/ios/extension/ExtensionContainer/AppDelegate.m
diff --git a/test/ios/extension/ExtensionContainer/AppDelegate.m b/test/ios/extension/ExtensionContainer/AppDelegate.m
new file mode 100644
index 0000000000000000000000000000000000000000..84aaa30a6782baf3bc74f4e5d63d81ab94b38fc3
--- /dev/null
+++ b/test/ios/extension/ExtensionContainer/AppDelegate.m
@@ -0,0 +1,36 @@
+// Copyright (c) 2014 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "AppDelegate.h"
+
+@interface AppDelegate ()
+
+
+@end
+
+@implementation AppDelegate
+
+
+- (BOOL)application:(UIApplication *)application
+    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+  // Override point for customization after application launch.
+  return YES;
+}
+
+- (void)applicationWillResignActive:(UIApplication *)application {
+}
+
+- (void)applicationDidEnterBackground:(UIApplication *)application {
+}
+
+- (void)applicationWillEnterForeground:(UIApplication *)application {
+}
+
+- (void)applicationDidBecomeActive:(UIApplication *)application {
+}
+
+- (void)applicationWillTerminate:(UIApplication *)application {
+}
+
+@end