Android: Add a java version of ObserverList.

base/base.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 1116 matching lines @@
           'target_name': 'base_java_test_support',
           'type': 'none',
           'dependencies': [
             'base_java',
           ],
           'variables': {
             'java_in_dir': '../base/test/android/javatests',
           },
           'includes': [ '../build/java.gypi' ],
         },
+        {
+          'target_name': 'base_javatests',
+          'type': 'none',
+          'dependencies': [
+            'base_java',
+            'base_java_test_support',
+          ],
+          'variables': {
+            'java_in_dir': '../base/android/javatests',
+          },
+          'includes': [ '../build/java.gypi' ],
+        },
       ],
     }],
     ['OS == "win"', {
       'targets': [
         {
           'target_name': 'debug_message',
           'type': 'executable',
           'sources': [
             'debug_message.cc',
           ],
@@ skipping 41 matching lines @@
             'base_unittests.isolate',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }