Add FIDO U2F message and packet classes

device/u2f/BUILD.gn

Index: device/u2f/BUILD.gn
diff --git a/device/u2f/BUILD.gn b/device/u2f/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..fbb9d50be95e4f2ebc7250b115015cd71bb373bc
--- /dev/null
+++ b/device/u2f/BUILD.gn
@@ -0,0 +1,20 @@
+# Copyright 2016 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.
+
+import("//build/config/features.gni")
+import("//testing/libfuzzer/fuzzer_test.gni")
+
+source_set("u2f") {
+  sources = [
+    "u2f_message.cc",
+    "u2f_message.h",
+    "u2f_packet.cc",
+    "u2f_packet.h",
+  ]
+
+  deps = [
+    "//base",
+    "//net",
+  ]
+}