Add recommended extension installation support

extensions/browser/test_management_policy.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_TEST_MANAGEMENT_POLICY_H_
 #define EXTENSIONS_BROWSER_TEST_MANAGEMENT_POLICY_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "extensions/browser/management_policy.h"
 
 namespace extensions {
 
 // This class provides a simple way to create providers with specific
 // restrictions and a known error message, for use in testing.
 class TestManagementPolicyProvider : public ManagementPolicy::Provider {
  public:
   enum AllowedActionFlag {
     ALLOW_ALL = 0,
     PROHIBIT_LOAD = 1 << 0,
     PROHIBIT_MODIFY_STATUS = 1 << 1,
     MUST_REMAIN_ENABLED = 1 << 2,
-    MUST_REMAIN_DISABLED = 1 << 3
+    MUST_REMAIN_DISABLED = 1 << 3,
+    MUST_REMAIN_INSTALLED = 1 << 4,
   };
 
   static std::string expected_error() {
     return "Action prohibited by test provider.";
   }
 
   TestManagementPolicyProvider();
   explicit TestManagementPolicyProvider(int prohibited_actions);
 
   void SetProhibitedActions(int prohibited_actions);
   void SetDisableReason(Extension::DisableReason reason);
 
   virtual std::string GetDebugPolicyProviderName() const override;
 
   virtual bool UserMayLoad(const Extension* extension,
                            base::string16* error) const override;
 
   virtual bool UserMayModifySettings(const Extension* extension,
                                      base::string16* error) const override;
 
   virtual bool MustRemainEnabled(const Extension* extension,
                                  base::string16* error) const override;
 
   virtual bool MustRemainDisabled(const Extension* extension,
                                   Extension::DisableReason* reason,
                                   base::string16* error) const override;
 
+  virtual bool MustRemainInstalled(const Extension* extension,
+                                   base::string16* error) const override;
+
  private:
   bool may_load_;
   bool may_modify_status_;
   bool must_remain_enabled_;
   bool must_remain_disabled_;
+  bool must_remain_installed_;
   Extension::DisableReason disable_reason_;
 
   base::string16 error_message_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_TEST_MANAGEMENT_POLICY_H_