Added a PolicyDomainDescriptor.

chrome/browser/policy/policy_bundle.h

 // Copyright (c) 2012 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_POLICY_POLICY_BUNDLE_H_
 #define CHROME_BROWSER_POLICY_POLICY_BUNDLE_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/policy/policy_service.h"
 
 namespace policy {
 
 class PolicyMap;
 
 // Maps policy namespaces to PolicyMaps.
 class PolicyBundle {
  public:
   typedef std::map<PolicyNamespace, PolicyMap*> MapType;
+  typedef MapType::iterator iterator;
   typedef MapType::const_iterator const_iterator;
 
   PolicyBundle();
   virtual ~PolicyBundle();
 
   // Returns the PolicyMap for namespace |ns|.
   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;
-  const_iterator end() const;
+  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  // CHROME_BROWSER_POLICY_POLICY_BUNDLE_H_