Fix log spew for "_comment..." policies.

components/policy/core/common/policy_map.h

Index: components/policy/core/common/policy_map.h
diff --git a/components/policy/core/common/policy_map.h b/components/policy/core/common/policy_map.h
index d3664ab066a9ab8da260965dae17d9dcb2ad7ade..2aa9a5910cf052a88cc7b4cfb1dad67cde32b4d5 100644
--- a/components/policy/core/common/policy_map.h
+++ b/components/policy/core/common/policy_map.h
@@ -78,6 +78,9 @@ class POLICY_EXPORT PolicyMap {
   // Erase the given |policy|, if it exists in this map.
   void Erase(const std::string& policy);
 
+  // Erase all entries for which |filter| returns true.
+  void EraseMatching(const base::Callback<bool(const const_iterator)>& filter);
+
   // Erase all entries for which |filter| returns false.
   void EraseNonmatching(
       const base::Callback<bool(const const_iterator)>& filter);
@@ -125,6 +128,10 @@ class POLICY_EXPORT PolicyMap {
   static bool MapEntryEquals(const PolicyMapType::value_type& a,
                              const PolicyMapType::value_type& b);
 
+  // Erase all entries for which |filter| returns |deletion_value|.
+  void FilterErase(const base::Callback<bool(const const_iterator)>& filter,
+                   bool deletion_value);
+
   PolicyMapType map_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyMap);