Add policy controlled permission block list for extensions

chrome/browser/extensions/permissions_based_management_policy_provider.h

+// Copyright 2014 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 CHROME_BROWSER_EXTENSIONS_PERMISSIONS_BASED_MANAGEMENT_POLICY_PROVIDER_H_
+#define CHROME_BROWSER_EXTENSIONS_PERMISSIONS_BASED_MANAGEMENT_POLICY_PROVIDER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "extensions/browser/management_policy.h"
+
+namespace extensions {
+
+class Extension;
+class ExtensionManagement;
+
+// A ManagementPolicyProvider controlled by enterprise policy, and prevent
+// certain extensions from loading by checking if its permission data conflicts
+// with policy or not.
+class PermissionsBasedManagementPolicyProvider
+    : public ManagementPolicy::Provider {
+ public:
+  explicit PermissionsBasedManagementPolicyProvider(
+      ExtensionManagement* settings);
+  ~PermissionsBasedManagementPolicyProvider() override;
+
+  // ManagementPolicy::Provider implementation.
+  std::string GetDebugPolicyProviderName() const override;
+  bool UserMayLoad(const Extension* extension,
+                           base::string16* error) const override;
+
+ private:
+  ExtensionManagement* settings_;
+
+  DISALLOW_COPY_AND_ASSIGN(PermissionsBasedManagementPolicyProvider);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_PERMISSIONS_BASED_MANAGEMENT_POLICY_PROVIDER_H_