Add GN build files for apple_sample_code and molokocacao targets.

third_party/molokocacao/BUILD.gn

Index: third_party/molokocacao/BUILD.gn
diff --git a/third_party/molokocacao/BUILD.gn b/third_party/molokocacao/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..9b660f5923ba91d288cb8255f8b90b7ecb350ac0
--- /dev/null
+++ b/third_party/molokocacao/BUILD.gn
@@ -0,0 +1,16 @@
+# 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.
+
+source_set("molokocacao") {
+  sources = [
+    "NSBezierPath+MCAdditions.h",
+    "NSBezierPath+MCAdditions.m",
+  ]
+
+  deps = [
+    "//third_party/google_toolbox_for_mac",
+  ]
+
+  libs = [ "AppKit.framework" ]
+}