Pref service: Batch pref updates.

services/preferences/public/cpp/pref_store_client_mixin.cc

 // Copyright 2017 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 "services/preferences/public/cpp/pref_store_client_mixin.h"
 
 #include <utility>
 
 #include "base/values.h"
 #include "services/preferences/public/cpp/pref_store_client.h"
@@ skipping 64 matching lines @@
 }
 
 template <typename BasePrefStore>
 void PrefStoreClientMixin<BasePrefStore>::ReportPrefValueChanged(
     const std::string& key) {
   for (auto& observer : observers_)
     observer.OnPrefValueChanged(key);
 }
 
 template <typename BasePrefStore>
+void PrefStoreClientMixin<BasePrefStore>::OnPrefsChanged(
+    std::vector<mojom::PrefUpdatePtr> updates) {
+  for (const auto& update : updates)
+    OnPrefChanged(update->key, std::move(update->value));
+}
+
+template <typename BasePrefStore>
+void PrefStoreClientMixin<BasePrefStore>::OnInitializationCompleted(
+    bool succeeded) {
+  if (!initialized_) {
+    initialized_ = true;
+    for (auto& observer : observers_)
+      observer.OnInitializationCompleted(succeeded);
+  }
+}
+
+template <typename BasePrefStore>
 void PrefStoreClientMixin<BasePrefStore>::OnPrefChanged(
     const std::string& key,
     std::unique_ptr<base::Value> value) {
   DCHECK(cached_prefs_);
   bool changed = false;
   if (!value) {  // Delete
     if (cached_prefs_->RemovePath(key, nullptr))
       changed = true;
   } else {
     const base::Value* prev;
     if (cached_prefs_->Get(key, &prev)) {
       if (!prev->Equals(value.get())) {
         cached_prefs_->Set(key, std::move(value));
         changed = true;
       }
     } else {
       cached_prefs_->Set(key, std::move(value));
       changed = true;
     }
   }
   if (changed && initialized_)
     ReportPrefValueChanged(key);
 }
 
-template <typename BasePrefStore>
-void PrefStoreClientMixin<BasePrefStore>::OnInitializationCompleted(
-    bool succeeded) {
-  if (!initialized_) {
-    initialized_ = true;
-    for (auto& observer : observers_)
-      observer.OnInitializationCompleted(succeeded);
-  }
-}
-
 template class PrefStoreClientMixin<::PrefStore>;
 template class PrefStoreClientMixin<::PersistentPrefStore>;
 
 }  // namespace prefs