Remove dependency of PrefSyncableService on Profile.

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
diff --git a/chrome/test/base/testing_profile.cc b/chrome/test/base/testing_profile.cc
index 527305cdb7e3466011a876e61a8f52db3934fe24..e2e94f5a956a5bd23fd74280a9d3f4ecfad50521 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -38,6 +38,7 @@
 #include "chrome/browser/profiles/storage_partition_descriptor.h"
 #include "chrome/browser/search_engines/template_url_fetcher_factory.h"
 #include "chrome/browser/sync/glue/sync_start_util.h"
+#include "chrome/browser/ui/prefs/prefs_tab_helper.h"
 #include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
 #include "chrome/browser/web_data_service_factory.h"
 #include "chrome/common/chrome_constants.h"
@@ -743,7 +744,8 @@ void TestingProfile::CreateIncognitoPrefService() {
   DCHECK(!testing_prefs_);
   // Simplified version of ProfileImpl::GetOffTheRecordPrefs(). Note this
   // leaves testing_prefs_ unset.
-  prefs_.reset(original_profile_->prefs_->CreateIncognitoPrefService(NULL));
+  prefs_.reset(original_profile_->prefs_->CreateIncognitoPrefService(
+      NULL, base::Bind(&PrefsTabHelper::InitIncognitoUserPrefStore)));
   user_prefs::UserPrefs::Set(this, prefs_.get());
 }