Add recommended extension installation support

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"
@@ skipping 38 matching lines @@
   // Initialize a provider with |policy_forcelist|, and check that it installs
   // exactly the extensions specified in |expected_extensions|.
   void Visit(const base::DictionaryValue& policy_forcelist,
              const std::set<std::string>& expected_extensions) {
     profile_.reset(new TestingProfile);
     profile_->GetTestingPrefService()->SetManagedPref(
         pref_names::kInstallForceList, policy_forcelist.DeepCopy());
     provider_.reset(new ExternalProviderImpl(
         this,
         new ExternalPolicyLoader(
-            ExtensionManagementFactory::GetForBrowserContext(profile_.get())),
+            ExtensionManagementFactory::GetForBrowserContext(profile_.get()),
+            ExternalPolicyLoader::FORCED),
         profile_.get(),
         Manifest::INVALID_LOCATION,
         Manifest::EXTERNAL_POLICY_DOWNLOAD,
         Extension::NO_FLAGS));
 
     // Extensions will be removed from this list as they visited,
     // so it should be emptied by the end.
     expected_extensions_ = expected_extensions;
     provider_->VisitRegisteredExtension();
     EXPECT_TRUE(expected_extensions_.empty());
@@ skipping 76 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