Implement Networking Private API CreateNetwork function on Windows.

components/wifi/wifi_service.h

Index: components/wifi/wifi_service.h
diff --git a/components/wifi/wifi_service.h b/components/wifi/wifi_service.h
index 9fc8411a4c6f93591861c83f13649d113af89e6a..a1b4bf1c3dae6c7d516de10fe11d16d67a3c2854 100644
--- a/components/wifi/wifi_service.h
+++ b/components/wifi/wifi_service.h
@@ -130,6 +130,10 @@ class WIFI_EXPORT WiFiService {
     std::string bssid;
     std::string type;
     std::string security;
+    // |password| field is used to pass wifi password for network creation via
+    // |CreateNetwork| or connection via |StartConnect|. It does not persist
+    // once operation is completed.
+    std::string password;
     // WiFi Signal Strength. 0..100
     uint32 signal_strength;
     bool auto_connect;