Fix subtle bug with the in-process utility thread usage in unit tests.

chrome/browser/extensions/extension_service_unittest.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/extensions/extension_service_unittest.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 593 matching lines @@
       profile_.get(), service_->extension_prefs(), service_));
 }
 
 // static
 void ExtensionServiceTestBase::SetUpTestCase() {
   ExtensionErrorReporter::Init(false);  // no noisy errors
 }
 
 void ExtensionServiceTestBase::SetUp() {
   ExtensionErrorReporter::GetInstance()->ClearErrors();
-  content::RenderProcessHost::SetRunRendererInProcess(true);
 }
 
 void ExtensionServiceTestBase::TearDown() {
-  content::RenderProcessHost::SetRunRendererInProcess(false);
 }
 
 ExtensionServiceTestBase::ExtensionServiceInitParams
 ExtensionServiceTestBase::CreateDefaultInitParams() {
   return CreateDefaultInitParamsInTempDir(&temp_dir_);
 }
 
 // static
 ExtensionServiceTestBase::ExtensionServiceInitParams
 ExtensionServiceTestBase::CreateDefaultInitParamsInTempDir(
@@ skipping 6151 matching lines @@
   // ReconcileKnownDisabled().
   service_->EnableExtension(good2);
   service_->ReconcileKnownDisabled();
   expected_extensions.insert(good2);
   expected_disabled_extensions.erase(good2);
 
   EXPECT_EQ(expected_extensions, service_->extensions()->GetIDs());
   EXPECT_EQ(expected_disabled_extensions,
             service_->disabled_extensions()->GetIDs());
 }