Removes MessageLoop::TYPE_XXX where possible

chrome/browser/extensions/external_policy_loader_unittest.cc

 // Copyright (c) 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.
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/values.h"
 #include "base/version.h"
 #include "chrome/browser/extensions/external_policy_loader.h"
 #include "chrome/browser/extensions/external_provider_impl.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_pref_service_syncable.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread.h"
 #include "extensions/browser/external_provider_interface.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
 
 namespace extensions {
 
 class ExternalPolicyLoaderTest : public testing::Test {
  public:
-  ExternalPolicyLoaderTest()
-      : loop_(base::MessageLoop::TYPE_IO),
-        ui_thread_(BrowserThread::UI, &loop_) {
+  ExternalPolicyLoaderTest() : ui_thread_(BrowserThread::UI, &loop_) {
   }
 
   virtual ~ExternalPolicyLoaderTest() {}
 
  private:
   // We need these to satisfy BrowserThread::CurrentlyOn(BrowserThread::UI)
   // checks in ExternalProviderImpl.
-  base::MessageLoop loop_;
+  base::MessageLoopForIO loop_;
   content::TestBrowserThread ui_thread_;
 };
 
 class MockExternalPolicyProviderVisitor
     : public ExternalProviderInterface::VisitorInterface {
  public:
   MockExternalPolicyProviderVisitor() {
   }
 
   // Initialize a provider with |policy_forcelist|, and check that it installs
@@ skipping 92 matching lines @@
   forced_extensions.SetString("invalid", "http://www.example.com/crx");
   forced_extensions.SetString("dddddddddddddddddddddddddddddddd",
                               std::string());
   forced_extensions.SetString("invalid", "bad");
 
   MockExternalPolicyProviderVisitor mv;
   mv.Visit(forced_extensions, expected_extensions);
 }
 
 }  // namespace extensions