Turns on use_mojo=1 for linux.

chrome/sync_integration_tests.isolate

 # Copyright 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.
 {
   'conditions': [
     ['OS=="linux"', {
       'variables': {
         'command': [
           '../testing/xvfb.py',
           '<(PRODUCT_DIR)',
           '<(PRODUCT_DIR)/sync_integration_tests<(EXECUTABLE_SUFFIX)',
           '--test-launcher-bot-mode',
         ],
         'isolate_dependency_tracked': [
           '../testing/test_env.py',
           '../testing/xvfb.py',
           '<(PRODUCT_DIR)/chrome_100_percent.pak',
           '<(PRODUCT_DIR)/libffmpegsumo.so',
           '<(PRODUCT_DIR)/libppGoogleNaClPluginChrome.so',
+          '<(PRODUCT_DIR)/lib/libmojo_system.so',
           '<(PRODUCT_DIR)/locales/en-US.pak',
           '<(PRODUCT_DIR)/nacl_helper<(EXECUTABLE_SUFFIX)',
           '<(PRODUCT_DIR)/nacl_helper_bootstrap<(EXECUTABLE_SUFFIX)',
           '<(PRODUCT_DIR)/nacl_irt_x86_64.nexe',
           '<(PRODUCT_DIR)/xdisplaycheck<(EXECUTABLE_SUFFIX)',
         ],
         'isolate_dependency_untracked': [
           '../net/tools/testserver/',
         ],
       },
@@ skipping 29 matching lines @@
           '<(PRODUCT_DIR)/ffmpegsumo.so',
         ],
         'isolate_dependency_untracked': [
           '<(PRODUCT_DIR)/<(mac_product_name) Framework.framework/',
           '<(PRODUCT_DIR)/<(mac_product_name).app/',
         ],
       },
     }],
   ],
 }