update_engine: 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: I770659a95be380a50fe3b2ba9f91d65818f40945
diff --git a/hardware_chromeos.cc b/hardware_chromeos.cc
index 2bd0de8..aac8ef2 100644
--- a/hardware_chromeos.cc
+++ b/hardware_chromeos.cc
@@ -20,7 +20,7 @@
 #include <base/logging.h>
 #include <base/strings/string_number_conversions.h>
 #include <base/strings/string_util.h>
-#include <chromeos/make_unique_ptr.h>
+#include <brillo/make_unique_ptr.h>
 #include <vboot/crossystem.h>
 
 extern "C" {
@@ -61,7 +61,7 @@
 
 // Factory defined in hardware.h.
 std::unique_ptr<HardwareInterface> CreateHardware() {
-  return chromeos::make_unique_ptr(new HardwareChromeOS());
+  return brillo::make_unique_ptr(new HardwareChromeOS());
 }
 
 }  // namespace hardware