Add recommended extension installation support

extensions/browser/test_management_policy.cc

 // Copyright 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 "extensions/browser/test_management_policy.h"
 
 #include "base/strings/utf_string_conversions.h"
 
 namespace extensions {
 
 TestManagementPolicyProvider::TestManagementPolicyProvider()
     : may_load_(true),
       may_modify_status_(true),
       must_remain_enabled_(false),
       must_remain_disabled_(false),
+      must_remain_installed_(false),
       disable_reason_(Extension::DISABLE_NONE) {
   error_message_ = base::UTF8ToUTF16(expected_error());
 }
 
 TestManagementPolicyProvider::TestManagementPolicyProvider(
     int prohibited_actions) {
   SetProhibitedActions(prohibited_actions);
   error_message_ = base::UTF8ToUTF16(expected_error());
 }
 
 void TestManagementPolicyProvider::SetProhibitedActions(
     int prohibited_actions) {
   may_load_ = (prohibited_actions & PROHIBIT_LOAD) == 0;
   may_modify_status_ = (prohibited_actions & PROHIBIT_MODIFY_STATUS) == 0;
   must_remain_enabled_ = (prohibited_actions & MUST_REMAIN_ENABLED) != 0;
   must_remain_disabled_ = (prohibited_actions & MUST_REMAIN_DISABLED) != 0;
+  must_remain_installed_ = (prohibited_actions & MUST_REMAIN_INSTALLED) != 0;
 }
 
 void TestManagementPolicyProvider::SetDisableReason(
     Extension::DisableReason reason) {
   disable_reason_ = reason;
 }
 
 std::string TestManagementPolicyProvider::GetDebugPolicyProviderName() const {
   return "the test management policy provider";
 }
@@ skipping 26 matching lines @@
     base::string16* error) const {
   if (must_remain_disabled_) {
     if (error)
       *error = error_message_;
     if (reason)
       *reason = disable_reason_;
   }
   return must_remain_disabled_;
 }
 
+bool TestManagementPolicyProvider::MustRemainInstalled(
+    const Extension* extension,
+    base::string16* error) const {
+  if (error && must_remain_installed_)
+    *error = error_message_;
+  return must_remain_installed_;
+}
 
 }  // namespace extensions