Eliminate silently letting errors pass on pak loading.

ui/base/ui_base_tests.isolate

 # Copyright 2013 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.
 {
   'conditions': [
     ['OS=="android"', {
       'variables': {
         'files': [
           'test/data/data_pack_unittest/truncated-header.pak',
           '<(PRODUCT_DIR)/locales/en-US.pak',
+          '<(PRODUCT_DIR)/chrome_100_percent.pak',
         ],
       },
     }],
   ],
   'includes': [
     '../../third_party/icu/icu.isolate',
   ],
 }