Fix missing dependency on java inputs for ContentShellTest.apk.

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 797 matching lines @@
               'action_name': 'copy_content_javatests_jar',
               'inputs': ['<(PRODUCT_DIR)/lib.java/chromium_content_javatests.jar'],
               'outputs': ['<(PRODUCT_DIR)/content_shell_test/java/libs/chromium_content_javatests.jar'],
               'action': ['cp', '<@(_inputs)', '<@(_outputs)'],
             },
             {
               'action_name': 'content_shell_test_generate_apk',
               'inputs': [
                 '<(DEPTH)/content/shell/android/javatests/content_shell_test_apk.xml',
                 '<(DEPTH)/content/shell/android/javatests/AndroidManifest.xml',
+                '<!@(find <(DEPTH)/content/shell/android/javatests/ -name "*.java")'
               ],
               'outputs': [
                 '<(PRODUCT_DIR)/content_shell_test/ContentShellTest-debug.apk',
               ],
               'action': [
                 'ant',
                 '-DPRODUCT_DIR=<(ant_build_out)',
                 '-DAPP_ABI=<(android_app_abi)',
                 '-buildfile',
                 '<(DEPTH)/content/shell/android/javatests/content_shell_test_apk.xml',
               ]
             }
           ],
         },
       ],
     }],
   ],
 }