Android: Add a java version of ObserverList.

content/content_tests.gypi

 # Copyright (c) 2012 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': [
     {
       'target_name': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 1014 matching lines @@
           'includes': [ '../build/java.gypi' ],
         },
         {
           'target_name': 'content_shell_test_apk',
           'type': 'none',
           'dependencies': [
             'content_java',
             'content_java_test_support',
             'content_shell_apk_java',
             '../base/base.gyp:base_java',
+            '../base/base.gyp:base_javatests',
             '../base/base.gyp:base_java_test_support',
             '../media/media.gyp:media_java',
             '../media/media.gyp:media_test_support',
             '../net/net.gyp:net_java',
             '../net/net.gyp:net_javatests',
             '../tools/android/forwarder2/forwarder.gyp:forwarder2',
           ],
           'variables': {
             'apk_name': 'ContentShellTest',
             'java_in_dir': '../content/shell/android/javatests',
             'additional_src_dirs': ['../content/public/android/javatests/',],
             'resource_dir': '../shell_apk/res',
             'is_test_apk': 1,
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
       ],
     }],
   ],
 }