Do not use the utility process on linux....

chrome/browser/utility_process_host_unittest.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/utility_process_host.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 106 matching lines @@
       message_loop_->Quit();
     }
   }
 
   MessageLoop* message_loop_;
   NotificationRegistrar registrar_;
   int child_id_;
   bool observed_;
 };
 
+#if !defined(OS_POSIX)
+// We should not run this on linux (crbug.com/22703) or MacOS (crbug.com/8102)
+// until problems related to autoupdate are fixed.
 TEST_F(UtilityProcessHostTest, ExtensionUnpacker) {
   // Copy the test extension into a temp dir and install from the temp dir.
   FilePath extension_file;
   ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &extension_file));
   extension_file = extension_file.AppendASCII("extensions")
                                  .AppendASCII("theme.crx");
   FilePath temp_extension_dir;
   ASSERT_TRUE(PathService::Get(base::DIR_TEMP, &temp_extension_dir));
   temp_extension_dir = temp_extension_dir.AppendASCII("extension_test");
   ASSERT_TRUE(file_util::CreateDirectory(temp_extension_dir));
   ASSERT_TRUE(file_util::CopyFile(extension_file,
                                   temp_extension_dir.AppendASCII("theme.crx")));
 
   scoped_refptr<TestUtilityProcessHostClient> client(
       new TestUtilityProcessHostClient(&message_loop_));
   ResourceDispatcherHost rdh(NULL);
   TestUtilityProcessHost* process_host =
       new TestUtilityProcessHost(client.get(), &message_loop_, &rdh);
   // process_host will delete itself when it's done.
   ProcessClosedObserver observer(&message_loop_);
   process_host->StartExtensionUnpacker(
       temp_extension_dir.AppendASCII("theme.crx"));
   observer.RunUntilClose(process_host->id());
   EXPECT_TRUE(client->success());
 
   // Clean up the temp dir.
   file_util::Delete(temp_extension_dir, true);
 }
+#endif
 
 }  // namespace