libchromeos: Clean up/moved file into sub-directories

Moved related files in libchromeos into sub-directories
to make it easier to navigate code.

BUG=None
TEST=FEATURES=test emerge-link libchromeos buffet peerd
CQ-DEPEND=CL:214763

Change-Id: I50d690f19f09a8f4d0da1154e63f58c76c415a55
Reviewed-on: https://chromium-review.googlesource.com/214499
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/buffet/device_registration_info_unittest.cc b/buffet/device_registration_info_unittest.cc
index 27aeaa0..097c0a6 100644
--- a/buffet/device_registration_info_unittest.cc
+++ b/buffet/device_registration_info_unittest.cc
@@ -5,8 +5,8 @@
 #include <base/json/json_reader.h>
 #include <base/values.h>
 #include <chromeos/bind_lambda.h>
-#include <chromeos/http_request.h>
-#include <chromeos/http_transport_fake.h>
+#include <chromeos/http/http_request.h>
+#include <chromeos/http/http_transport_fake.h>
 #include <chromeos/mime_utils.h>
 #include <gtest/gtest.h>