Add SSID getter to WiFiService

components/wifi/wifi_service_win.cc

Index: components/wifi/wifi_service_win.cc
diff --git a/components/wifi/wifi_service_win.cc b/components/wifi/wifi_service_win.cc
index 812686841d6257dc46f8854ba7b34e7b37213eb8..c86a32a8b6ff26d20878cd411866bb439bab1ab6 100644
--- a/components/wifi/wifi_service_win.cc
+++ b/components/wifi/wifi_service_win.cc
@@ -226,6 +226,9 @@ class WiFiServiceImpl : public WiFiService {
 
   virtual void RequestConnectedNetworkUpdate() override {}
 
+  virtual void GetConnectedNetworkSSID(std::string* ssid,
+                                       std::string* error) override;
+
  private:
   typedef int32 EncryptionType;
   enum EncryptionTypeEnum {
@@ -806,6 +809,18 @@ void WiFiServiceImpl::SetEventObservers(
   }
 }
 
+void WiFiServiceImpl::GetConnectedNetworkSSID(std::string* ssid,
+                                              std::string* error) {
+  DWORD error_code = EnsureInitialized();
+  if (CheckError(error_code, kErrorWiFiService, error))
+    return;
+  NetworkProperties connected_properties;
+  error_code = GetCurrentProperties(&connected_properties);

[mef, 2015/01/30 17:45:41]

GetCurrentProperties may be a little overkill for this as it also gets list of
network's BSS using WlanGetNetworkBssList. 
I don't think it should cause any issues, but I would double-check that.

[meacer, 2015/01/30 19:11:50]

Added a lightweight version that doesn't use the BSS list: GetCurrentSSID.
Please let me know if you prefer this.

[mef, 2015/01/30 19:45:11]

Yeah, I think this has less performance concerns.

+  if (CheckError(error_code, kErrorWiFiService, error))
+    return;
+  *ssid = connected_properties.ssid;
+}
+
 void WiFiServiceImpl::OnWlanNotificationCallback(
     PWLAN_NOTIFICATION_DATA wlan_notification_data,
     PVOID context) {