Introduce per-tab preferences service.

chrome/browser/prefs/pref_service_mock_builder.cc

Index: chrome/browser/prefs/pref_service_mock_builder.cc
diff --git a/chrome/browser/prefs/pref_service_mock_builder.cc b/chrome/browser/prefs/pref_service_mock_builder.cc
index c4916cbc97e265b9152884a002e49c72c1b802bf..a206e62a6cd1d3e8b3fef5a424c61309d9656f9f 100644
--- a/chrome/browser/prefs/pref_service_mock_builder.cc
+++ b/chrome/browser/prefs/pref_service_mock_builder.cc
@@ -7,6 +7,8 @@
 #include "chrome/browser/policy/configuration_policy_pref_store.h"
 #include "chrome/browser/prefs/command_line_pref_store.h"
 #include "chrome/browser/prefs/default_pref_store.h"
+#include "chrome/browser/prefs/pref_notifier_impl.h"
+#include "chrome/browser/prefs/pref_value_store.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/testing_pref_store.h"
 #include "chrome/common/json_pref_store.h"
@@ -109,16 +111,26 @@ PrefServiceMockBuilder::WithUserFilePrefs(const FilePath& prefs_file) {
 }
 
 PrefService* PrefServiceMockBuilder::Create() {
+  DefaultPrefStore* default_pref_store = new DefaultPrefStore();
+  PrefNotifierImpl* pref_notifier = new PrefNotifierImpl();
   PrefService* pref_service =
-      new PrefService(managed_platform_prefs_.get(),
-                      managed_cloud_prefs_.get(),
-                      extension_prefs_.get(),
-                      command_line_prefs_.get(),
-                      user_prefs_.get(),
-                      recommended_platform_prefs_.get(),
-                      recommended_cloud_prefs_.get(),
-                      new DefaultPrefStore(),
-                      false);
+      new PrefService(
+          pref_notifier,
+          new PrefValueStore(
+              managed_platform_prefs_.get(),
+              managed_cloud_prefs_.get(),
+              extension_prefs_.get(),
+              command_line_prefs_.get(),
+              user_prefs_.get(),
+              recommended_platform_prefs_.get(),
+              recommended_cloud_prefs_.get(),
+              default_pref_store,
+              NULL,
+              pref_notifier),
+          user_prefs_.get(),
+          default_pref_store,
+          NULL,
+          false);
   managed_platform_prefs_ = NULL;
   managed_cloud_prefs_ = NULL;
   extension_prefs_ = NULL;