This CL adds support for extension in GYP.

test/ios/extension/ExtensionContainer/main.m

Index: test/ios/extension/ExtensionContainer/main.m
diff --git a/test/ios/extension/ExtensionContainer/main.m b/test/ios/extension/ExtensionContainer/main.m
new file mode 100644
index 0000000000000000000000000000000000000000..216743b0496e418844bd72349a72481b2d069ccb
--- /dev/null
+++ b/test/ios/extension/ExtensionContainer/main.m
@@ -0,0 +1,13 @@
+// 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 <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char * argv[]) {
+  @autoreleasepool {
+      return UIApplicationMain(argc, argv, nil,
+          NSStringFromClass([AppDelegate class]));
+  }
+}