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diff --git a/components/policy/core/common/policy_bundle.h b/components/policy/core/common/policy_bundle.h
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+++ b/components/policy/core/common/policy_bundle.h
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+// 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 COMPONENTS_POLICY_CORE_COMMON_POLICY_BUNDLE_H_
+#define COMPONENTS_POLICY_CORE_COMMON_POLICY_BUNDLE_H_
+
+#include <map>
+#include <memory>
+#include <string>
+
+#include "base/macros.h"
+#include "components/policy/core/common/policy_map.h"
+#include "components/policy/core/common/policy_namespace.h"
+#include "components/policy/policy_export.h"
+
+namespace policy {
+
+// Maps policy namespaces to PolicyMaps.
+class POLICY_EXPORT PolicyBundle {
+ public:
+  using MapType = std::map<PolicyNamespace, std::unique_ptr<PolicyMap>>;
+  using iterator = MapType::iterator;
+  using const_iterator = MapType::const_iterator;
+
+  PolicyBundle();
+  virtual ~PolicyBundle();
+
+  // Returns the PolicyMap for namespace |ns|. Creates a new map if necessary.
+  PolicyMap& Get(const PolicyNamespace& ns);
+  const PolicyMap& Get(const PolicyNamespace& ns) const;
+
+  // Swaps the internal representation of |this| with |other|.
+  void Swap(PolicyBundle* other);
+
+  // |this| becomes a copy of |other|. Any existing PolicyMaps are dropped.
+  void CopyFrom(const PolicyBundle& other);
+
+  // Merges the PolicyMaps of |this| with those of |other| for each namespace
+  // in common. Also adds copies of the (namespace, PolicyMap) pairs in |other|
+  // that don't have an entry in |this|.
+  // Each policy in each PolicyMap is replaced only if the policy from |other|
+  // has a higher priority.
+  // See PolicyMap::MergeFrom for details on merging individual PolicyMaps.
+  void MergeFrom(const PolicyBundle& other);
+
+  // Returns true if |other| has the same keys and value as |this|.
+  bool Equals(const PolicyBundle& other) const;
+
+  // Returns iterators to the beginning and end of the underlying container.
+  iterator begin() { return policy_bundle_.begin(); }
+  iterator end() { return policy_bundle_.end(); }
+
+  // These can be used to iterate over and read the PolicyMaps, but not to
+  // modify them.
+  const_iterator begin() const { return policy_bundle_.begin(); }
+  const_iterator end() const { return policy_bundle_.end(); }
+
+  // Erases all the existing pairs.
+  void Clear();
+
+ private:
+  MapType policy_bundle_;
+
+  // An empty PolicyMap that is returned by const Get() for namespaces that
+  // do not exist in |policy_bundle_|.
+  const PolicyMap kEmpty_;
+
+  DISALLOW_COPY_AND_ASSIGN(PolicyBundle);
+};
+
+}  // namespace policy
+
+#endif  // COMPONENTS_POLICY_CORE_COMMON_POLICY_BUNDLE_H_