Remove unnecessary FileDescriptor sync

PiperOrigin-RevId: 255380796

library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheDataSink.java

@@ -49,7 +49,6 @@ public final class CacheDataSink implements DataSink {
   private final long fragmentSize;
   private final int bufferSize;
 
-  private boolean syncFileDescriptor;
   private DataSpec dataSpec;
   private long dataSpecFragmentSize;
   private File file;
@@ -108,18 +107,6 @@ public final class CacheDataSink implements DataSink {
     this.cache = Assertions.checkNotNull(cache);
     this.fragmentSize = fragmentSize == C.LENGTH_UNSET ? Long.MAX_VALUE : fragmentSize;
     this.bufferSize = bufferSize;
-    syncFileDescriptor = true;
-  }
-
-  /**
-   * Sets whether file descriptors are synced when closing output streams.
-   *
-   * <p>This method is experimental, and will be renamed or removed in a future release.
-   *
-   * @param syncFileDescriptor Whether file descriptors are synced when closing output streams.
-   */
-  public void experimental_setSyncFileDescriptor(boolean syncFileDescriptor) {
-    this.syncFileDescriptor = syncFileDescriptor;
   }
 
   @Override
@@ -207,9 +194,6 @@ public final class CacheDataSink implements DataSink {
     boolean success = false;
     try {
       outputStream.flush();
-      if (syncFileDescriptor) {
-        underlyingFileOutputStream.getFD().sync();
-      }
       success = true;
     } finally {
       Util.closeQuietly(outputStream);

library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheDataSinkFactory.java

@@ -26,8 +26,6 @@ public final class CacheDataSinkFactory implements DataSink.Factory {
   private final long fragmentSize;
   private final int bufferSize;
 
-  private boolean syncFileDescriptor;
-
   /** @see CacheDataSink#CacheDataSink(Cache, long) */
   public CacheDataSinkFactory(Cache cache, long fragmentSize) {
     this(cache, fragmentSize, CacheDataSink.DEFAULT_BUFFER_SIZE);
@@ -40,20 +38,8 @@ public final class CacheDataSinkFactory implements DataSink.Factory {
     this.bufferSize = bufferSize;
   }
 
-  /**
-   * See {@link CacheDataSink#experimental_setSyncFileDescriptor(boolean)}.
-   *
-   * <p>This method is experimental, and will be renamed or removed in a future release.
-   */
-  public CacheDataSinkFactory experimental_setSyncFileDescriptor(boolean syncFileDescriptor) {
-    this.syncFileDescriptor = syncFileDescriptor;
-    return this;
-  }
-
   @Override
   public DataSink createDataSink() {
-    CacheDataSink dataSink = new CacheDataSink(cache, fragmentSize, bufferSize);
-    dataSink.experimental_setSyncFileDescriptor(syncFileDescriptor);
-    return dataSink;
+    return new CacheDataSink(cache, fragmentSize, bufferSize);
   }
 }