[Sync] Create new top-level sync/ directory

Move sync .proto files to sync/protocol.  Update all references.

This begins the Great Sync Migration.

BUG=117585,43624
TEST=

Review URL: https://chromiumcodereview.appspot.com/9668028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@125967 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/sync/backend_migrator_unittest.cc b/chrome/browser/sync/backend_migrator_unittest.cc
index c8b59789..0c53bde 100644
--- a/chrome/browser/sync/backend_migrator_unittest.cc
+++ b/chrome/browser/sync/backend_migrator_unittest.cc
@@ -9,11 +9,11 @@
 #include "chrome/browser/sync/glue/data_type_manager_mock.h"
 #include "chrome/browser/sync/internal_api/write_transaction.h"
 #include "chrome/browser/sync/profile_sync_service_mock.h"
-#include "chrome/browser/sync/protocol/sync.pb.h"
 #include "chrome/browser/sync/sessions/session_state.h"
 #include "chrome/browser/sync/syncable/model_type_test_util.h"
 #include "chrome/browser/sync/test/engine/test_user_share.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "sync/protocol/sync.pb.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"