Enable sync for the settings from the Extension Settings API.

chrome/browser/sync/profile_sync_factory_impl.h

Index: chrome/browser/sync/profile_sync_factory_impl.h
diff --git a/chrome/browser/sync/profile_sync_factory_impl.h b/chrome/browser/sync/profile_sync_factory_impl.h
index 1403f5d7dc10118de8e850bc510ae885d7b61938..650f4075a436212383872cb3f98fc85b17266f68 100644
--- a/chrome/browser/sync/profile_sync_factory_impl.h
+++ b/chrome/browser/sync/profile_sync_factory_impl.h
@@ -12,6 +12,7 @@
 #include "chrome/browser/sync/profile_sync_factory.h"
 
 class CommandLine;
+class ExtensionSettings;
 class Profile;
 
 class ProfileSyncFactoryImpl : public ProfileSyncFactory {
@@ -49,6 +50,11 @@ class ProfileSyncFactoryImpl : public ProfileSyncFactory {
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler);
 
+  virtual SyncComponents CreateExtensionSettingSyncComponents(
+      ExtensionSettings* extension_settings,
+      ProfileSyncService* profile_sync_service,
+      browser_sync::UnrecoverableErrorHandler* error_handler);
+
   virtual SyncComponents CreateExtensionSyncComponents(
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler);