Make a JsonPrefStore readable while mid-interception.

chrome/browser/prefs/interceptable_pref_filter.cc

Index: chrome/browser/prefs/interceptable_pref_filter.cc
diff --git a/chrome/browser/prefs/interceptable_pref_filter.cc b/chrome/browser/prefs/interceptable_pref_filter.cc
index b04c07ddf54dbc473290976b15e1544b7b9bb8fd..065ba38d7462c86e3ab8e0b505545fd99d4b7b55 100644
--- a/chrome/browser/prefs/interceptable_pref_filter.cc
+++ b/chrome/browser/prefs/interceptable_pref_filter.cc
@@ -11,11 +11,10 @@ InterceptablePrefFilter::~InterceptablePrefFilter() {}
 
 void InterceptablePrefFilter::FilterOnLoad(
     const PostFilterOnLoadCallback& post_filter_on_load_callback,
-    scoped_ptr<base::DictionaryValue> pref_store_contents) {
+    base::DictionaryValue* pref_store_contents) {
   if (filter_on_load_interceptor_.is_null()) {
-    FinalizeFilterOnLoad(post_filter_on_load_callback,
-                         pref_store_contents.Pass(),
-                         false);
+    FinalizeFilterOnLoad(
+        post_filter_on_load_callback, pref_store_contents, false);
   } else {
     // Note, in practice (in the implementation as it was in May 2014) it would
     // be okay to pass an unretained |this| pointer below, but in order to avoid
@@ -25,9 +24,10 @@ void InterceptablePrefFilter::FilterOnLoad(
     const FinalizeFilterOnLoadCallback finalize_filter_on_load(
         base::Bind(&InterceptablePrefFilter::FinalizeFilterOnLoad,
                    AsWeakPtr(),
-                   post_filter_on_load_callback));
+                   post_filter_on_load_callback,
+                   pref_store_contents));
     filter_on_load_interceptor_.Run(finalize_filter_on_load,
-                                    pref_store_contents.Pass());
+                                    pref_store_contents);
     filter_on_load_interceptor_.Reset();
   }
 }