Add support for iOS WatchKit apps in GYP

test/ios/watch/WatchKitExtension/InterfaceController.m

Index: test/ios/watch/WatchKitExtension/InterfaceController.m
diff --git a/test/ios/watch/WatchKitExtension/InterfaceController.m b/test/ios/watch/WatchKitExtension/InterfaceController.m
new file mode 100644
index 0000000000000000000000000000000000000000..564b7d1da55a31f8b893ae1064d5a77f922c6306
--- /dev/null
+++ b/test/ios/watch/WatchKitExtension/InterfaceController.m
@@ -0,0 +1,25 @@
+// 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 "InterfaceController.h"
+
+@implementation InterfaceController
+
+- (instancetype)initWithContext:(id)context {
+  if ((self = [super initWithContext:context])) {
+    // -initWithContext:
+  }
+  return self;
+}
+
+- (void)willActivate {
+  // -willActivate
+}
+
+- (void)didDeactivate {
+  // -didDeactivate
+}
+
+@end
+