Remove TODOs that we have little urge to actually do.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=123410274

demo/src/main/java/com/google/android/exoplayer/demo/TestMediaDrmCallback.java

@@ -24,6 +24,10 @@ import android.media.MediaDrm.ProvisionRequest;
 import android.text.TextUtils;
 
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
@@ -66,7 +70,7 @@ import java.util.UUID;
   @Override
   public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request) throws IOException {
     String url = request.getDefaultUrl() + "&signedRequest=" + new String(request.getData());
-    return Util.executePost(url, null, null);
+    return executePost(url, null, null);
   }
 
   @Override
@@ -75,7 +79,43 @@ import java.util.UUID;
     if (TextUtils.isEmpty(url)) {
       url = defaultUrl;
     }
-    return Util.executePost(url, request.getData(), keyRequestProperties);
+    return executePost(url, request.getData(), keyRequestProperties);
+  }
+
+  private static byte[] executePost(String url, byte[] data, Map<String, String> requestProperties)
+      throws IOException {
+    HttpURLConnection urlConnection = null;
+    try {
+      urlConnection = (HttpURLConnection) new URL(url).openConnection();
+      urlConnection.setRequestMethod("POST");
+      urlConnection.setDoOutput(data != null);
+      urlConnection.setDoInput(true);
+      if (requestProperties != null) {
+        for (Map.Entry<String, String> requestProperty : requestProperties.entrySet()) {
+          urlConnection.setRequestProperty(requestProperty.getKey(), requestProperty.getValue());
+        }
+      }
+      // Write the request body, if there is one.
+      if (data != null) {
+        OutputStream out = urlConnection.getOutputStream();
+        try {
+          out.write(data);
+        } finally {
+          out.close();
+        }
+      }
+      // Read and return the response body.
+      InputStream inputStream = urlConnection.getInputStream();
+      try {
+        return Util.toByteArray(inputStream);
+      } finally {
+        inputStream.close();
+      }
+    } finally {
+      if (urlConnection != null) {
+        urlConnection.disconnect();
+      }
+    }
   }
 
 }

library/src/main/java/com/google/android/exoplayer/MediaCodecUtil.java

@@ -127,8 +127,6 @@ public final class MediaCodecUtil {
     if (secure && decoderInfos.isEmpty() && 21 <= Util.SDK_INT && Util.SDK_INT <= 23) {
       // Some devices don't list secure decoders on API level 21 [Internal: b/18678462]. Try the
       // legacy path. We also try this path on API levels 22 and 23 as a defensive measure.
-      // TODO: Verify that the issue cannot occur on API levels 22 and 23, and tighten this block
-      // to execute on API level 21 only if confirmed.
       mediaCodecList = new MediaCodecListCompatV16();
       decoderInfos = getDecoderInfosInternal(key, mediaCodecList);
       if (!decoderInfos.isEmpty()) {

library/src/main/java/com/google/android/exoplayer/MediaCodecVideoTrackRenderer.java

@@ -194,8 +194,6 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
           decoderCapable = decoderInfo.isVideoSizeSupportedV21(format.width, format.height);
         }
       } else {
-        // TODO[REFACTOR]: We should probably assume that we can decode at least the resolution of
-        // the display, or the camera, as a sanity check?
         decoderCapable = format.width * format.height <= MediaCodecUtil.maxH264DecodableFrameSize();
       }
     } else {

library/src/main/java/com/google/android/exoplayer/chunk/ChunkSource.java

@@ -21,11 +21,6 @@ import java.util.List;
 /**
  * A provider of {@link Chunk}s for a {@link ChunkTrackStream} to load.
  */
-/*
- * TODO: Share more state between this interface and {@link ChunkSampleSource}. In particular
- * implementations of this class needs to know about errors, and should be more tightly integrated
- * into the process of resuming loading of a chunk after an error occurs.
- */
 public interface ChunkSource {
 
   /**

library/src/main/java/com/google/android/exoplayer/dash/DashSegmentIndex.java

@@ -20,8 +20,6 @@ import com.google.android.exoplayer.dash.mpd.RangedUri;
 
 /**
  * Indexes the segments within a media stream.
- *
- * TODO: Generalize to cover all chunk streaming modes (e.g. SmoothStreaming) if possible.
  */
 public interface DashSegmentIndex {
 

library/src/main/java/com/google/android/exoplayer/dash/mpd/MediaPresentationDescriptionParser.java

@@ -75,8 +75,6 @@ public class MediaPresentationDescriptionParser extends DefaultHandler
   /**
    * @param contentId An optional content identifier to include in the parsed manifest.
    */
-  // TODO: Remove the need to inject a content identifier here, by not including it in the parsed
-  // manifest. Instead, it should be injected directly where needed (i.e. DashChunkSource).
   public MediaPresentationDescriptionParser(String contentId) {
     this.contentId = contentId;
     try {

library/src/main/java/com/google/android/exoplayer/extractor/DefaultTrackOutput.java

@@ -355,7 +355,6 @@ public final class DefaultTrackOutput implements TrackOutput {
    * @param target The array into which data should be written.
    * @param length The number of bytes to read.
    */
-  // TODO: Consider reducing duplication of this method and the one above.
   private void readData(long absolutePosition, byte[] target, int length) {
     int bytesRead = 0;
     while (bytesRead < length) {
@@ -713,8 +712,9 @@ public final class DefaultTrackOutput implements TrackOutput {
         return -1;
       }
 
-      // TODO: This can be optimized further using binary search, although the fact that the array
+      // This could be optimized to use a binary search, however in practice callers to this method
-      // is cyclic means we'd need to implement the binary search ourselves.
+      // often pass times near to the start of the buffer. Hence it's unclear whether switching to
+      // a binary search would yield any real benefit.
       int sampleCount = 0;
       int sampleCountToKeyframe = -1;
       int searchIndex = relativeReadIndex;

library/src/main/java/com/google/android/exoplayer/extractor/ts/SeiReader.java

@@ -25,8 +25,6 @@ import com.google.android.exoplayer.util.ParsableByteArray;
 /**
  * Consumes SEI buffers, outputting contained EIA608 messages to a {@link TrackOutput}.
  */
-// TODO: Technically, we shouldn't allow a sample to be read from the queue until we're sure that
-// a sample with an earlier timestamp won't be added to it.
 /* package */ final class SeiReader {
 
   private final TrackOutput output;

library/src/main/java/com/google/android/exoplayer/util/Util.java

@@ -36,7 +36,6 @@ import java.io.OutputStream;
 import java.lang.reflect.Method;
 import java.math.BigDecimal;
 import java.net.HttpURLConnection;
-import java.net.URL;
 import java.text.ParseException;
 import java.util.Arrays;
 import java.util.Calendar;
@@ -44,7 +43,6 @@ import java.util.Collections;
 import java.util.GregorianCalendar;
 import java.util.List;
 import java.util.Locale;
-import java.util.Map;
 import java.util.TimeZone;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -731,52 +729,6 @@ public final class Util {
         + ") " + "ExoPlayerLib/" + ExoPlayerLibraryInfo.VERSION;
   }
 
-  /**
-   * Executes a post request using {@link HttpURLConnection}.
-   *
-   * @param url The request URL.
-   * @param data The request body, or null.
-   * @param requestProperties Request properties, or null.
-   * @return The response body.
-   * @throws IOException If an error occurred making the request.
-   */
-  // TODO: Remove this and use HttpDataSource once DataSpec supports inclusion of a POST body.
-  public static byte[] executePost(String url, byte[] data, Map<String, String> requestProperties)
-      throws IOException {
-    HttpURLConnection urlConnection = null;
-    try {
-      urlConnection = (HttpURLConnection) new URL(url).openConnection();
-      urlConnection.setRequestMethod("POST");
-      urlConnection.setDoOutput(data != null);
-      urlConnection.setDoInput(true);
-      if (requestProperties != null) {
-        for (Map.Entry<String, String> requestProperty : requestProperties.entrySet()) {
-          urlConnection.setRequestProperty(requestProperty.getKey(), requestProperty.getValue());
-        }
-      }
-      // Write the request body, if there is one.
-      if (data != null) {
-        OutputStream out = urlConnection.getOutputStream();
-        try {
-          out.write(data);
-        } finally {
-          out.close();
-        }
-      }
-      // Read and return the response body.
-      InputStream inputStream = urlConnection.getInputStream();
-      try {
-        return toByteArray(inputStream);
-      } finally {
-        inputStream.close();
-      }
-    } finally {
-      if (urlConnection != null) {
-        urlConnection.disconnect();
-      }
-    }
-  }
-
   /**
    * Converts a sample bit depth to a corresponding PCM encoding constant.
    *