shill: Add support to set physical mode.

BUG=chromium-os:24776
TEST=Unit tests, network_WiFiManager

Change-Id: Ic46404e71dbb54a06a7d668992a96df9f8db2598
Reviewed-on: https://gerrit.chromium.org/gerrit/15765
Commit-Ready: Thieu Le <thieule@chromium.org>
Reviewed-by: Thieu Le <thieule@chromium.org>
Tested-by: Thieu Le <thieule@chromium.org>
diff --git a/wpa_supplicant.h b/wpa_supplicant.h
index 46a0c74..c115917 100644
--- a/wpa_supplicant.h
+++ b/wpa_supplicant.h
@@ -12,7 +12,9 @@
 namespace wpa_supplicant {
 extern const char kBSSPropertyBSSID[];
 extern const char kBSSPropertyFrequency[];
+extern const char kBSSPropertyIEs[];
 extern const char kBSSPropertyMode[];
+extern const char kBSSPropertyRates[];
 extern const char kBSSPropertySSID[];
 extern const char kBSSPropertySignal[];
 extern const char kCaPath[];