Fix force policy installation of the removed pref-installed extension

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.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1216 matching lines @@
 
   // Try adding the same extension from an external update URL.
   ASSERT_FALSE(service()->pending_extension_manager()->AddFromExternalUpdateUrl(
       good_crx,
       std::string(),
       GURL("http:://fake.update/url"),
       Manifest::EXTERNAL_PREF_DOWNLOAD,
       Extension::NO_FLAGS,
       false));
 
+  // Installation of the same extension through the policy should be successful.
+  ASSERT_TRUE(service()->pending_extension_manager()->AddFromExternalUpdateUrl(
+      good_crx,
+      std::string(),
+      GURL("http:://fake.update/url"),
+      Manifest::EXTERNAL_POLICY_DOWNLOAD,
+      Extension::NO_FLAGS,
+      false));
+  EXPECT_TRUE(service()->pending_extension_manager()->IsIdPending(good_crx));
+  EXPECT_TRUE(service()->pending_extension_manager()->Remove(good_crx));
+
   ASSERT_FALSE(service()->pending_extension_manager()->IsIdPending(good_crx));
 }
 
 // Test that uninstalling an external extension does not crash when
 // the extension could not be loaded.
 // This extension shown in preferences file requires an experimental permission.
 // It could not be loaded without such permission.
 TEST_F(ExtensionServiceTest, UninstallingNotLoadedExtension) {
   base::FilePath source_install_dir =
       data_dir().AppendASCII("good").AppendASCII("Extensions");
@@ skipping 5692 matching lines @@
   ExtensionPrefs* prefs = ExtensionPrefs::Get(profile());
   EXPECT_TRUE(registry()->disabled_extensions().Contains(id));
   EXPECT_TRUE(prefs->HasDisableReason(id, Extension::DISABLE_CORRUPTED));
 
   base::FilePath v2_path = data_dir().AppendASCII("good2.crx");
   UpdateExtension(id, v2_path, ENABLED);
 
   EXPECT_FALSE(registry()->disabled_extensions().Contains(id));
   EXPECT_FALSE(prefs->HasDisableReason(id, Extension::DISABLE_CORRUPTED));
 }