Enable Popular Sites in Android demo mode.

components/ntp_tiles.gypi

 # 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.
 
 {
   'targets': [
     {
       # GN version: //components/ntp_tiles
       'target_name': 'ntp_tiles',
       'type': 'static_library',
@@ skipping 19 matching lines @@
         'ntp_tiles/pref_names.cc',
         'ntp_tiles/switches.h',
         'ntp_tiles/switches.cc',
       ],
       'conditions': [
         ['OS != "ios"', {
           'dependencies': [
             'safe_json',
           ],
         }],
+        ['OS == "android"', {
+          'dependencies': [
+            'ntp_tiles_jni_headers',
+          ],
+        }],
       ],
     },
   ],
 
   'conditions': [
     ['OS == "android"', {
       'targets': [
         {
           # GN: //components/ntp_tiles:ntp_tiles_enums_java
           'target_name': 'ntp_tiles_enums_java',
           'type': 'none',
           'variables': {
             'source_file': 'ntp_tiles/most_visited_sites.h',
           },
           'includes': [
             '../build/android/java_cpp_enum.gypi'
           ],
         },
+        {
+          # GN version: //components/ntp_tiles/android:ntp_tiles_java
+          'target_name': 'ntp_tiles_java',
+          'type': 'none',
+          'dependencies': [
+            '../base/base.gyp:base',
+          ],
+          'variables': {
+            'java_in_dir': 'ntp_tiles/android/java',
+          },
+          'includes': [ '../build/java.gypi' ],
+        },
+        {
+          # GN version: //components/ntp_tiles:jni
+          'target_name': 'ntp_tiles_jni_headers',
+          'type': 'none',
+          'sources': [
+            'ntp_tiles/android/java/src/org/chromium/components/ntptiles/MostVisitedSites.java',
+          ],
+          'variables': {
+            'jni_gen_package': 'ntp_tiles',
+          },
+          'includes': [ '../build/jni_generator.gypi' ],
+        },
       ],
     }],
   ],
 }