[Android] Add chrome_java target for building Java code in the chromium layer.

chrome/chrome_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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 4554 matching lines @@
     }],  # 'coverage!=0'
     # Special target to wrap a gtest_target_type==shared_library
     # unit_tests into an android apk for execution.
     ['OS == "android" and gtest_target_type == "shared_library"', {
       'targets': [
         {
           'target_name': 'unit_tests_apk',
           'type': 'none',
           'dependencies': [
             '../base/base.gyp:base_java',
+            'chrome_java',
             'unit_tests',
           ],
           'variables': {
             'test_suite_name': 'unit_tests',
             'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)unit_tests<(SHARED_LIB_SUFFIX)',
             'input_jars_paths': [
               '<(PRODUCT_DIR)/lib.java/chromium_base.jar',
              ],
           },
           'includes': [ '../build/apk_test.gypi' ],
@@ skipping 61 matching lines @@
                 '--result', '<@(_outputs)',
                 '--isolate', 'browser_tests.isolate',
               ],
             },
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }