Enable permission warnings from ManifestHandlers.

chrome/common/extensions/chrome_manifest_permission_set.h

+// 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.
+
+#ifndef CHROME_COMMON_EXTENSIONS_CHROME_MANIFEST_PERMISSION_SET_H_
+#define CHROME_COMMON_EXTENSIONS_CHROME_MANIFEST_PERMISSION_SET_H_
+
+#include <string>
+#include <vector>
+
+#include "base/strings/string16.h"
+
+namespace base {
+class ListValue;
+}
+
+namespace extensions {
+class ManifestPermissionSet;
+}
+
+namespace extensions {
+
+class ChromeManifestPermissionSet {
+ public:
+  // Parses permissions from |permissions| and adds the parsed permissions to
+  // |manifest_permissions|. If |unhandled_permissions| is not NULL, the names
+  // of all permissions that couldn't be parsed will be added to this vector.
+  // If |error| is NULL, parsing will continue with the next permission if
+  // invalid data is detected. If |error| is not NULL, it will be set to an
+  // error message and false is returned when an invalid permission is found.
+  static bool ParseFromJSON(
+      const base::ListValue* permissions,
+      ManifestPermissionSet* manifest_permissions,
+      string16* error,
+      std::vector<std::string>* unhandled_permissions);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_COMMON_EXTENSIONS_CHROME_MANIFEST_PERMISSION_SET_H_