Add browser tests for FetchEvent.request.mode/credentials in the service worker

chrome/chrome_tests.gypi

 # 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.
 {
   'variables': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 2238 matching lines @@
         ['enable_autofill_dialog==0', {
           'sources!': [
             'browser/ui/autofill/autofill_dialog_controller_browsertest.cc',
           ]
         }],
         ['disable_nacl==0', {
           'sources':[
             'browser/extensions/extension_nacl_browsertest.cc',
             'browser/nacl_host/test/gdb_debug_stub_browsertest.cc',
           ],
+          'dependencies': [
+            'test/data/nacl/nacl_test_data.gyp:pnacl_url_loader_test',
+          ],
           'conditions': [
             ['disable_nacl_untrusted==0', {
               'sources': [
                 'test/nacl/nacl_browsertest.cc',
                 'test/nacl/nacl_browsertest_uma.cc',
                 'test/nacl/nacl_browsertest_util.cc',
                 'test/nacl/nacl_browsertest_util.h',
                 'test/nacl/pnacl_header_test.cc',
                 'test/nacl/pnacl_header_test.h',
               ],
@@ skipping 1226 matching lines @@
             'browser',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
           ],
         }]
     }],
   ],  # 'conditions'
 }