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)',
@@ skipping 10 matching lines @@
           '<(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/',
         ],
       },
     }],
+    ['OS=="linux" and use_mojo==1', {
+      'variables': {
+        'isolate_dependency_tracked': [
+          '<(PRODUCT_DIR)/lib/libmojo_system.so',
+        ],
+      },
+    }],
     ['OS=="linux" or OS=="mac"', {
       'variables': {
         'isolate_dependency_tracked': [
           '<(PRODUCT_DIR)/resources.pak',
           '<(PRODUCT_DIR)/sync_integration_tests<(EXECUTABLE_SUFFIX)',
         ],
         'isolate_dependency_untracked': [
           '../third_party/pyftpdlib/',
           '../third_party/pywebsocket/',
           '../third_party/tlslite/',
@@ skipping 18 matching lines @@
           '<(PRODUCT_DIR)/ffmpegsumo.so',
         ],
         'isolate_dependency_untracked': [
           '<(PRODUCT_DIR)/<(mac_product_name) Framework.framework/',
           '<(PRODUCT_DIR)/<(mac_product_name).app/',
         ],
       },
     }],
   ],
 }