[Sync] Move sync/{internal_api,syncable} into syncer namespace

sync/internal_api/debug_info_event_listener_unittest.cc

Index: sync/internal_api/debug_info_event_listener_unittest.cc
diff --git a/sync/internal_api/debug_info_event_listener_unittest.cc b/sync/internal_api/debug_info_event_listener_unittest.cc
index e37c8e2d50797afdea6de7b2b314f5fc03b4ca02..72f9039ca1bf34b5670dac225ae81b6918fcb4ac 100644
--- a/sync/internal_api/debug_info_event_listener_unittest.cc
+++ b/sync/internal_api/debug_info_event_listener_unittest.cc
@@ -2,13 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
 #include "sync/internal_api/debug_info_event_listener.h"
+
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace syncer {
+
 typedef testing::Test DebugInfoEventListenerTest;
 
-namespace syncer {
 TEST_F(DebugInfoEventListenerTest, VerifyEventsAdded) {
   syncer::DebugInfoEventListener debug_info_event_listener;
   debug_info_event_listener.CreateAndAddEvent(