Enable sync for the settings from the Extension Settings API.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index dc4d403fdcc1b66339a973c7eeefc9a547942a91..090f2ebf560a8d062bc7adbd83b902f02654e392 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -579,14 +579,12 @@ ExtensionService::ExtensionService(Profile* profile,
                                    const CommandLine* command_line,
                                    const FilePath& install_directory,
                                    ExtensionPrefs* extension_prefs,
-                                   ExtensionSettings* extension_settings,
                                    bool autoupdate_enabled,
                                    bool extensions_enabled)
     : weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
       method_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
       profile_(profile),
       extension_prefs_(extension_prefs),
-      extension_settings_(extension_settings),
       pending_extension_manager_(*ALLOW_THIS_IN_INITIALIZER_LIST(this)),
       install_directory_(install_directory),
       extensions_enabled_(extensions_enabled),
@@ -634,6 +632,10 @@ ExtensionService::ExtensionService(Profile* profile,
       new ExtensionServiceBackend(weak_ptr_factory_.GetWeakPtr(),
                                   install_directory_);
 
+  extension_settings_.reset(
+      new ExtensionSettingsUIWrapper(
+          profile_->GetPath().AppendASCII(kSettingsDirectoryName)));
+
   if (extensions_enabled_) {
     ExternalExtensionProviderImpl::CreateExternalProviders(
         this, profile_, &external_extension_providers_);
@@ -1653,8 +1655,8 @@ ExtensionPrefs* ExtensionService::extension_prefs() {
   return extension_prefs_;
 }
 
-ExtensionSettings* ExtensionService::extension_settings() {
-  return extension_settings_;
+ExtensionSettingsUIWrapper* ExtensionService::extension_settings() {
+  return extension_settings_.get();
 }
 
 ExtensionContentSettingsStore*