Introduce BookmarkClient interface to abstract embedder

chrome/browser/bookmarks/bookmark_model_factory.cc

Index: chrome/browser/bookmarks/bookmark_model_factory.cc
diff --git a/chrome/browser/bookmarks/bookmark_model_factory.cc b/chrome/browser/bookmarks/bookmark_model_factory.cc
index c54cff9c1285df3827e68aa987686022c4355fac..c32a7559d0adcadc45e4c6a194f7ea89db34109c 100644
--- a/chrome/browser/bookmarks/bookmark_model_factory.cc
+++ b/chrome/browser/bookmarks/bookmark_model_factory.cc
@@ -19,6 +19,7 @@
 #include "components/bookmarks/core/common/bookmark_pref_names.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/user_prefs/pref_registry_syncable.h"
+#include "content/public/browser/browser_thread.h"
 
 // static
 BookmarkModel* BookmarkModelFactory::GetForProfile(Profile* profile) {
@@ -48,8 +49,10 @@ KeyedService* BookmarkModelFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   Profile* profile = static_cast<Profile*>(context);
   BookmarkModel* bookmark_model = new BookmarkModel(profile);
-  bookmark_model->Load(StartupTaskRunnerServiceFactory::GetForProfile(profile)->
-      GetBookmarkTaskRunner());
+  bookmark_model->Load(StartupTaskRunnerServiceFactory::GetForProfile(profile)
+                           ->GetBookmarkTaskRunner(),
+                       content::BrowserThread::GetMessageLoopProxyForThread(
+                           content::BrowserThread::UI));
 #if !defined(OS_ANDROID)
   if (CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kEnableBookmarkUndo)) {