Make a JsonPrefStore readable while mid-interception.

chrome/browser/prefs/pref_hash_filter.cc

Index: chrome/browser/prefs/pref_hash_filter.cc
diff --git a/chrome/browser/prefs/pref_hash_filter.cc b/chrome/browser/prefs/pref_hash_filter.cc
index 044fe18cd572365c59886cf16ba0d4275bfe2085..b77036e8c6cc694b0a7d99fc65834aa74d34f834 100644
--- a/chrome/browser/prefs/pref_hash_filter.cc
+++ b/chrome/browser/prefs/pref_hash_filter.cc
@@ -162,7 +162,7 @@ void PrefHashFilter::FilterSerializeData(
 
 void PrefHashFilter::FinalizeFilterOnLoad(
     const PostFilterOnLoadCallback& post_filter_on_load_callback,
-    scoped_ptr<base::DictionaryValue> pref_store_contents,
+    base::DictionaryValue* pref_store_contents,
     bool prefs_altered) {
   DCHECK(pref_store_contents);
   base::TimeTicks checkpoint = base::TimeTicks::Now();
@@ -173,7 +173,7 @@ void PrefHashFilter::FinalizeFilterOnLoad(
         pref_hash_store_->BeginTransaction());
     for (TrackedPreferencesMap::const_iterator it = tracked_paths_.begin();
          it != tracked_paths_.end(); ++it) {
-      if (it->second->EnforceAndReport(pref_store_contents.get(),
+      if (it->second->EnforceAndReport(pref_store_contents,
                                        hash_store_transaction.get())) {
         did_reset = true;
         prefs_altered = true;
@@ -194,5 +194,5 @@ void PrefHashFilter::FinalizeFilterOnLoad(
   UMA_HISTOGRAM_TIMES("Settings.FilterOnLoadTime",
                       base::TimeTicks::Now() - checkpoint);
 
-  post_filter_on_load_callback.Run(pref_store_contents.Pass(), prefs_altered);
+  post_filter_on_load_callback.Run(prefs_altered);
 }