system/core: Rename "chromeos" -> "brillo" in include paths and namespaces

libchromeos is transitioning to libbrillo and chromeos namespaces
and include directory is changing to brillo.

Bug: 24872993
Change-Id: I797613a38c7444a113f12e38366a424388477276
diff --git a/crash_reporter/unclean_shutdown_collector_test.cc b/crash_reporter/unclean_shutdown_collector_test.cc
index c5c0662..3bdeca1 100644
--- a/crash_reporter/unclean_shutdown_collector_test.cc
+++ b/crash_reporter/unclean_shutdown_collector_test.cc
@@ -20,12 +20,12 @@
 
 #include <base/files/file_util.h>
 #include <base/strings/string_util.h>
-#include <chromeos/syslog_logging.h>
+#include <brillo/syslog_logging.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
 using base::FilePath;
-using ::chromeos::FindLog;
+using ::brillo::FindLog;
 
 namespace {
 
@@ -65,7 +65,7 @@
     base::DeleteFile(test_unclean_, true);
     // Set up an alternate power manager state file as well
     collector_.powerd_suspended_file_ = FilePath(kTestSuspended);
-    chromeos::ClearLog();
+    brillo::ClearLog();
   }
 
  protected: