Update the super MAC after performing MAC validation.

chrome/browser/prefs/pref_hash_store_impl.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 "chrome/browser/prefs/pref_hash_store_impl.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/values.h"
 #include "chrome/browser/prefs/pref_hash_store_transaction.h"
@@ skipping 22 matching lines @@
   // Constructs a PrefHashStoreTransactionImpl which can use the private
   // members of its |outer| PrefHashStoreImpl.
   explicit PrefHashStoreTransactionImpl(PrefHashStoreImpl* outer);
   virtual ~PrefHashStoreTransactionImpl();
 
   // PrefHashStoreTransaction implementation.
   virtual ValueState CheckValue(const std::string& path,
                                 const base::Value* value) const OVERRIDE;
   virtual void StoreHash(const std::string& path,
                          const base::Value* value) OVERRIDE;
+  virtual bool StampSuperMac() OVERRIDE;
   virtual ValueState CheckSplitValue(
       const std::string& path,
       const base::DictionaryValue* initial_split_value,
       std::vector<std::string>* invalid_keys) const OVERRIDE;
   virtual void StoreSplitHash(
       const std::string& path,
       const base::DictionaryValue* split_value) OVERRIDE;
 
  private:
   bool GetSplitMacs(const std::string& path,
@@ skipping 88 matching lines @@
 }
 
 void PrefHashStoreImpl::PrefHashStoreTransactionImpl::StoreHash(
     const std::string& path, const base::Value* new_value) {
   const std::string mac =
       outer_->pref_hash_calculator_.Calculate(path, new_value);
   (*outer_->contents_->GetMutableContents())->SetString(path, mac);
   has_changed_ = true;
 }
 
+bool PrefHashStoreImpl::PrefHashStoreTransactionImpl::StampSuperMac() {
+  if (outer_->initial_hashes_dictionary_trusted_)
+    return false;
+  has_changed_ = true;
+  return true;
+}
+
 PrefHashStoreTransaction::ValueState
 PrefHashStoreImpl::PrefHashStoreTransactionImpl::CheckSplitValue(
     const std::string& path,
     const base::DictionaryValue* initial_split_value,
     std::vector<std::string>* invalid_keys) const {
   DCHECK(invalid_keys && invalid_keys->empty());
 
   std::map<std::string, std::string> split_macs;
   const bool has_hashes = GetSplitMacs(path, &split_macs);
 
@@ skipping 101 matching lines @@
        it.Advance()) {
     std::string mac_string;
     if (!it.value().GetAsString(&mac_string)) {
       NOTREACHED();
       continue;
     }
     split_macs->insert(make_pair(it.key(), mac_string));
   }
   return true;
 }