Fix missing generics

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=129624395

extensions/okhttp/src/main/java/com/google/android/exoplayer2/ext/okhttp/DefaultOkHttpDataSourceFactory.java

@@ -32,16 +32,16 @@ public final class DefaultOkHttpDataSourceFactory implements Factory {
   private final Context context;
   private final OkHttpClient client;
   private final String userAgent;
-  private final TransferListener transferListener;
+  private final TransferListener<? super DataSource> transferListener;
   private final CacheControl cacheControl;
 
   public DefaultOkHttpDataSourceFactory(Context context, OkHttpClient client, String userAgent,
-      TransferListener transferListener) {
+      TransferListener<? super DataSource> transferListener) {
     this(context, client, userAgent, transferListener, null);
   }
 
   public DefaultOkHttpDataSourceFactory(Context context, OkHttpClient client, String userAgent,
-      TransferListener transferListener, CacheControl cacheControl) {
+      TransferListener<? super DataSource> transferListener, CacheControl cacheControl) {
     this.context = context.getApplicationContext();
     this.client = client;
     this.userAgent = userAgent;

library/src/main/java/com/google/android/exoplayer2/upstream/DefaultDataSource.java

@@ -57,8 +57,8 @@ public final class DefaultDataSource implements DataSource {
    * @param allowCrossProtocolRedirects Whether cross-protocol redirects (i.e. redirects from HTTP
    *     to HTTPS and vice versa) are enabled when fetching remote data..
    */
-  public DefaultDataSource(Context context, TransferListener listener, String userAgent,
-      boolean allowCrossProtocolRedirects) {
+  public DefaultDataSource(Context context, TransferListener<? super DataSource> listener,
+      String userAgent, boolean allowCrossProtocolRedirects) {
     this(context, listener,
         new DefaultHttpDataSource(userAgent, null, listener,
             DefaultHttpDataSource.DEFAULT_CONNECT_TIMEOUT_MILLIS,
@@ -74,7 +74,8 @@ public final class DefaultDataSource implements DataSource {
    * @param baseDataSource A {@link DataSource} to use for URI schemes other than file, asset and
    *     content. This {@link DataSource} should normally support at least http(s).
    */
-  public DefaultDataSource(Context context, TransferListener listener, DataSource baseDataSource) {
+  public DefaultDataSource(Context context, TransferListener<? super DataSource> listener,
+      DataSource baseDataSource) {
     this.baseDataSource = Assertions.checkNotNull(baseDataSource);
     this.fileDataSource = new FileDataSource(listener);
     this.assetDataSource = new AssetDataSource(context, listener);

library/src/main/java/com/google/android/exoplayer2/upstream/DefaultDataSourceFactory.java

@@ -26,7 +26,7 @@ public final class DefaultDataSourceFactory implements Factory {
 
   private final Context context;
   private final String userAgent;
-  private final TransferListener listener;
+  private final TransferListener<? super DataSource> listener;
   private final boolean allowCrossProtocolRedirects;
 
   /**
@@ -42,7 +42,8 @@ public final class DefaultDataSourceFactory implements Factory {
    * @param userAgent The User-Agent string that should be used.
    * @param listener An optional listener.
    */
-  public DefaultDataSourceFactory(Context context, String userAgent, TransferListener listener) {
+  public DefaultDataSourceFactory(Context context, String userAgent,
+      TransferListener<? super DataSource> listener) {
     this(context, userAgent, listener, false);
   }
 
@@ -53,8 +54,8 @@ public final class DefaultDataSourceFactory implements Factory {
    * @param allowCrossProtocolRedirects Whether cross-protocol redirects (i.e. redirects from HTTP
    *     to HTTPS and vice versa) are enabled.
    */
-  public DefaultDataSourceFactory(Context context, String userAgent, TransferListener listener,
-      boolean allowCrossProtocolRedirects) {
+  public DefaultDataSourceFactory(Context context, String userAgent,
+      TransferListener<? super DataSource> listener, boolean allowCrossProtocolRedirects) {
     this.context = context.getApplicationContext();
     this.userAgent = userAgent;
     this.listener = listener;

library/src/main/java/com/google/android/exoplayer2/upstream/UdpDataSource.java

@@ -68,7 +68,7 @@ public final class UdpDataSource implements DataSource {
   /**
    * @param listener An optional listener.
    */
-  public UdpDataSource(TransferListener listener) {
+  public UdpDataSource(TransferListener<? super UdpDataSource> listener) {
     this(listener, DEFAULT_MAX_PACKET_SIZE);
   }
 

playbacktests/src/main/java/com/google/android/exoplayer2/playbacktests/gts/DashTest.java

@@ -732,7 +732,7 @@ public final class DashTest extends ActivityInstrumentationTestCase2<HostActivit
 
     @Override
     public MediaSource buildSource(HostActivity host, String userAgent,
-        TransferListener mediaTransferListener) {
+        TransferListener<? super DataSource> mediaTransferListener) {
       DataSource.Factory manifestDataSourceFactory = new DefaultDataSourceFactory(host, userAgent);
       DataSource.Factory mediaDataSourceFactory = new DefaultDataSourceFactory(host, userAgent,
           mediaTransferListener);

playbacktests/src/main/java/com/google/android/exoplayer2/playbacktests/util/ExoHostedTest.java

@@ -35,12 +35,12 @@ import com.google.android.exoplayer2.trackselection.AdaptiveVideoTrackSelection;
 import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
 import com.google.android.exoplayer2.trackselection.MappingTrackSelector;
 import com.google.android.exoplayer2.upstream.BandwidthMeter;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import com.google.android.exoplayer2.util.Util;
 import junit.framework.Assert;
 
-
 /**
  * A {@link HostedTest} for {@link ExoPlayer} playback tests.
  */
@@ -307,7 +307,7 @@ public abstract class ExoHostedTest implements HostedTest, ExoPlayer.EventListen
 
   @SuppressWarnings("unused")
   protected abstract MediaSource buildSource(HostActivity host, String userAgent,
-      TransferListener mediaTransferListener);
+      TransferListener<? super DataSource> mediaTransferListener);
 
   @SuppressWarnings("unused")
   protected void onPlayerErrorInternal(ExoPlaybackException error) {