Changed previews component to be a layered component.

components/previews/core/previews_ui_service_unittest.cc

Index: components/previews/core/previews_ui_service_unittest.cc
diff --git a/components/previews/previews_ui_service_unittest.cc b/components/previews/core/previews_ui_service_unittest.cc
similarity index 95%
rename from components/previews/previews_ui_service_unittest.cc
rename to components/previews/core/previews_ui_service_unittest.cc
index 55dddcfbdecef49bea04eb6fd8dc20964b6ca16b..47b448192c3b934120577a3abe6e58ffd6dcf7cf 100644
--- a/components/previews/previews_ui_service_unittest.cc
+++ b/components/previews/core/previews_ui_service_unittest.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "components/previews/previews_ui_service.h"
+#include "components/previews/core/previews_ui_service.h"
 
 #include <memory>
 
@@ -11,7 +11,7 @@
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
-#include "components/previews/previews_io_data.h"
+#include "components/previews/core/previews_io_data.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace previews {