Migrate sync/ to base::RunLoop::RunUntilIdle()

sync/internal_api/js_sync_encryption_handler_observer_unittest.cc

Index: sync/internal_api/js_sync_encryption_handler_observer_unittest.cc
diff --git a/sync/internal_api/js_sync_encryption_handler_observer_unittest.cc b/sync/internal_api/js_sync_encryption_handler_observer_unittest.cc
index 09fc4bf5213200bddcb08b7921e7321f9be3b00d..42322796e3d8ed15247043a2ae96cc978fc4d5a5 100644
--- a/sync/internal_api/js_sync_encryption_handler_observer_unittest.cc
+++ b/sync/internal_api/js_sync_encryption_handler_observer_unittest.cc
@@ -6,7 +6,7 @@
 
 #include "base/basictypes.h"
 #include "base/location.h"
-#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/values.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/util/sync_string_conversions.h"
@@ -41,7 +41,7 @@ class JsSyncEncryptionHandlerObserverTest : public testing::Test {
   JsSyncEncryptionHandlerObserver js_sync_encryption_handler_observer_;
 
   void PumpLoop() {
-    message_loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
   }
 };