Enable sync for the settings from the Extension Settings API.

chrome/browser/sync/profile_sync_factory_mock.h

Index: chrome/browser/sync/profile_sync_factory_mock.h
diff --git a/chrome/browser/sync/profile_sync_factory_mock.h b/chrome/browser/sync/profile_sync_factory_mock.h
index ddefd391e49c30ceaf74a28fd846bd3e9e229a73..801308adc195817c0de62e931c352121220cb2b9 100644
--- a/chrome/browser/sync/profile_sync_factory_mock.h
+++ b/chrome/browser/sync/profile_sync_factory_mock.h
@@ -11,6 +11,8 @@
 #include "chrome/browser/sync/profile_sync_factory.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
+class ExtensionSettings;
+
 namespace browser_sync {
 class AssociatorInterface;
 class ChangeProcessor;
@@ -52,6 +54,10 @@ class ProfileSyncFactoryMock : public ProfileSyncFactory {
   MOCK_METHOD2(CreateExtensionSyncComponents,
       SyncComponents(ProfileSyncService* profile_sync_service,
                      browser_sync::UnrecoverableErrorHandler* error_handler));
+  MOCK_METHOD3(CreateExtensionSettingSyncComponents,
+      SyncComponents(ExtensionSettings* extension_settings,
+                     ProfileSyncService* profile_sync_service,
+                     browser_sync::UnrecoverableErrorHandler* error_handler));
   MOCK_METHOD3(CreatePasswordSyncComponents,
                SyncComponents(
                    ProfileSyncService* profile_sync_service,