[webnfc] Implement push method for Android nfc mojo service.

device/nfc/android/BUILD.gn

Index: device/nfc/android/BUILD.gn
diff --git a/device/nfc/android/BUILD.gn b/device/nfc/android/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..96af30bfaec4561abee7206549f70d29ee259b9d
--- /dev/null
+++ b/device/nfc/android/BUILD.gn
@@ -0,0 +1,22 @@
+# 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/android/config.gni")
+import("//build/config/android/rules.gni")
+
+android_library("java") {
+  java_files = [
+    "java/src/org/chromium/device/nfc/InvalidNfcMessageException.java",
+    "java/src/org/chromium/device/nfc/NfcImpl.java",
+    "java/src/org/chromium/device/nfc/NfcTagHandler.java",
+    "java/src/org/chromium/device/nfc/NfcTypeConverter.java",
+  ]
+
+  deps = [
+    "//base:base_java",
+    "//device/nfc:mojo_bindings_java",
+    "//mojo/public/java:bindings",
+    "//mojo/public/java:system",
+  ]
+}