Refactor ActivityStatus to not store current activity

net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java

Index: net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
diff --git a/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java b/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
index 981e3dc5f7aa6ce57d3d75331b802f08bbe063f9..e372002000b40c82c7da2352976bc9836b3382da 100644
--- a/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
+++ b/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
@@ -22,7 +22,7 @@ import org.chromium.base.ActivityStatus;
  * ACCESS_NETWORK_STATE permission.
  */
 public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver
-        implements ActivityStatus.StateListener {
+        implements ActivityStatus.ApplicationStateListener {
 
     /** Queries the ConnectivityManager for information about the current connection. */
     static class ConnectivityManagerDelegate {
@@ -107,7 +107,7 @@ public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver
         mWifiManagerDelegate = new WifiManagerDelegate(context);
         mConnectionType = getCurrentConnectionType();
         mWifiSSID = getCurrentWifiSSID();
-        ActivityStatus.registerStateListener(this);
+        ActivityStatus.registerApplicationStateListener(this);
     }
 
     /**
@@ -203,19 +203,13 @@ public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver
         connectionTypeChanged();
     }
 
-    // ActivityStatus.StateListener
+    // ActivityStatus.ApplicationStateListener
     @Override
-    public void onActivityStateChange(int state) {
-        if (state == ActivityStatus.RESUMED) {
-            // Note that this also covers the case where the main activity is created. The CREATED
-            // event is always followed by the RESUMED event. This is a temporary "hack" until
-            // http://crbug.com/176837 is fixed. The CREATED event can't be used reliably for now
-            // since its notification is deferred. This means that it can immediately follow a
-            // DESTROYED/STOPPED/... event which is problematic.
-            // TODO(pliard): fix http://crbug.com/176837.
+    public void onApplicationStateChange(int newState) {
+        if (newState == ActivityStatus.APP_RUNNING) {
             connectionTypeChanged();
             registerReceiver();
-        } else if (state == ActivityStatus.PAUSED) {
+        } else if (newState == ActivityStatus.APP_PAUSED) {
             unregisterReceiver();
         }
     }