Add fake for InstanceIDWithSubtype.java, in order to re-use unit test

components/gcm_driver.gypi

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       # GN version: //components/gcm_driver/common
       'target_name': 'gcm_driver_common',
       'type': '<(component)',
@@ skipping 197 matching lines @@
         '../testing/gtest.gyp:gtest',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         # Note: file list duplicated in GN build.
         'gcm_driver/instance_id/fake_gcm_driver_for_instance_id.cc',
         'gcm_driver/instance_id/fake_gcm_driver_for_instance_id.h',
       ],
+      'conditions': [
+        ['OS == "android"', {
+          'dependencies': [
+            'instance_id_driver_test_support_jni_headers',
+          ],
+        }],
+      ],
     },
     {
       # GN version: //components/gcm_driver/crypto
       'target_name': 'gcm_driver_crypto',
       'type': 'static_library',
       'dependencies': [
         'gcm_driver_crypto_proto',
         '../base/base.gyp:base',
         '../components/components.gyp:leveldb_proto',
         '../crypto/crypto.gyp:crypto',
@@ skipping 104 matching lines @@
           'type': 'none',
           'dependencies': [
             '../base/base.gyp:base_java',
           ],
           'variables': {
             'java_in_dir': 'gcm_driver/instance_id/android/java',
           },
           'includes': [ '../build/java.gypi' ],
         },
         {
+          # GN version: //components/gcm_driver/instance_id/android:instance_id_driver_test_support_java
+          'target_name': 'instance_id_driver_test_support_java',
+          'type': 'none',
+          'dependencies': [
+            'instance_id_driver_java',
+          ],
+          'variables': {
+            'java_in_dir': 'gcm_driver/instance_id/android/javatests',
+          },
+          'includes': [ '../build/java.gypi' ],
+        },
+        {
           # GN version: //components/gcm_driver/instance_id/android:jni_headers
           'target_name': 'instance_id_driver_jni_headers',
           'type': 'none',
           'sources': [
             'gcm_driver/instance_id/android/java/src/org/chromium/components/gcm_driver/instance_id/InstanceIDBridge.java',
           ],
           'variables': {
             'jni_gen_package': 'components/gcm_driver/instance_id',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
+        {
+          # GN version: //components/gcm_driver/instance_id/android:test_support_jni_headers
+          'target_name': 'instance_id_driver_test_support_jni_headers',
+          'type': 'none',
+          'sources': [
+            'gcm_driver/instance_id/android/javatests/src/org/chromium/components/gcm_driver/instance_id/FakeInstanceIDWithSubtype.java',
+          ],
+          'variables': {
+            'jni_gen_package': 'components/gcm_driver/instance_id',
+          },
+          'includes': [ '../build/jni_generator.gypi' ],
+        },
       ],
      },
     ],
   ],
 }