Obtain WiFi SSID on Android using Android APIs

net/android/network_change_notifier_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 ////////////////////////////////////////////////////////////////////////////////
 // Threading considerations:
 //
 // This class is designed to meet various threading guarantees starting from the
 // ones imposed by NetworkChangeNotifier:
 // - The notifier can be constructed on any thread.
 // - GetCurrentConnectionType() can be called on any thread.

[Not at Google. Contact bengr, 2016/06/23 20:08:56]

Should GetCurrentWiFiSSID be added here as well? Although the .h file is
typically where this information is documented.

[tbansal1, 2016/06/27 19:48:20]

Not sure if it is necessary since this is sort of an internal class. Consumers
are expected to only use NetworkChangeNotifier which describes  the function
GetCurrentWiFiSSID.

 //
 // The fact that this implementation of NetworkChangeNotifier is backed by a
 // Java side singleton class (see NetworkChangeNotifier.java) adds another
 // threading constraint:
 // - The calls to the Java side (stateful) object must be performed from a
 //   single thread. This object happens to be a singleton which is used on the
 //   application side on the main thread. Therefore all the method calls from
 //   the native NetworkChangeNotifierAndroid class to its Java counterpart are
 //   performed on the main thread.
 //
@@ skipping 138 matching lines @@
   return delegate_->GetCurrentConnectionType();
 }
 
 void NetworkChangeNotifierAndroid::GetCurrentMaxBandwidthAndConnectionType(
     double* max_bandwidth_mbps,
     ConnectionType* connection_type) const {
   delegate_->GetCurrentMaxBandwidthAndConnectionType(max_bandwidth_mbps,
                                                      connection_type);
 }
 
+std::string NetworkChangeNotifierAndroid::GetCurrentWiFiSSID() const {
+  return delegate_->GetCurrentWiFiSSID();
+}
+
 void NetworkChangeNotifierAndroid::ForceNetworkHandlesSupportedForTesting() {
   force_network_handles_supported_for_testing_ = true;
 }
 
 bool NetworkChangeNotifierAndroid::AreNetworkHandlesCurrentlySupported() const {
   // Notifications for API using NetworkHandles and querying using
   // NetworkHandles only implemented for Android versions >= L.
   return force_network_handles_supported_for_testing_ ||
          (base::android::BuildInfo::GetInstance()->sdk_int() >=
           base::android::SDK_VERSION_LOLLIPOP);
@@ skipping 95 matching lines @@
       NetworkChangeNotifier::GetConnectionType();
   NetworkChangeNotifier::LogOperatorCodeHistogram(type);
   if (NetworkChangeNotifier::IsConnectionCellular(type)) {
     UMA_HISTOGRAM_ENUMERATION("NCN.CellularConnectionSubtype",
                               delegate_->GetCurrentConnectionSubtype(),
                               SUBTYPE_LAST + 1);
   }
 }
 
 }  // namespace net