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

components/policy/core/common/policy_map.cc

 // 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.
 
 #include "components/policy/core/common/policy_map.h"
 
 #include <algorithm>
 
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
@@ skipping 75 matching lines @@
 }
 
 void PolicyMap::Set(const std::string& policy, Entry entry) {
   map_[policy] = std::move(entry);
 }
 
 void PolicyMap::Erase(const std::string& policy) {
   map_.erase(policy);
 }
 
+void PolicyMap::EraseMatching(
+    const base::Callback<bool(const const_iterator)>& filter) {
+  FilterErase(filter, true);
+}
+
 void PolicyMap::EraseNonmatching(
     const base::Callback<bool(const const_iterator)>& filter) {
-  PolicyMapType::iterator iter(map_.begin());
-  while (iter != map_.end()) {
-    if (!filter.Run(iter)) {
-      map_.erase(iter++);
-    } else {
-      ++iter;
-    }
-  }
+  FilterErase(filter, false);
 }
 
 void PolicyMap::Swap(PolicyMap* other) {
   map_.swap(other->map_);
 }
 
 void PolicyMap::CopyFrom(const PolicyMap& other) {
   Clear();
   for (const auto& it : other)
     Set(it.first, it.second.DeepCopy());
@@ skipping 76 matching lines @@
 void PolicyMap::Clear() {
   map_.clear();
 }
 
 // static
 bool PolicyMap::MapEntryEquals(const PolicyMap::PolicyMapType::value_type& a,
                                const PolicyMap::PolicyMapType::value_type& b) {
   return a.first == b.first && a.second.Equals(b.second);
 }
 
+void PolicyMap::FilterErase(
+    const base::Callback<bool(const const_iterator)>& filter,
+    bool deletion_value) {
+  PolicyMapType::iterator iter(map_.begin());
+  while (iter != map_.end()) {
+    if (filter.Run(iter) == deletion_value) {
+      map_.erase(iter++);
+    } else {
+      ++iter;
+    }
+  }
+}
+
 }  // namespace policy