Delete browser MSE implementation.

media/base/android/java/src/org/chromium/media/MediaDrmBridge.java

 // Copyright 2013 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.
 
 package org.chromium.media;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.media.MediaCrypto;
 import android.media.MediaDrm;
 import android.os.Build;
 
 import org.chromium.base.Log;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.annotations.MainDex;
 
 import java.nio.ByteBuffer;
 import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.UUID;
 
 /**
  * A wrapper of the android MediaDrm class. Each MediaDrmBridge manages multiple
- * sessions for a single MediaSourcePlayer.
+ * sessions for AndroidVideoDecodeAccelerators and MediaCodecAudioDecoders.
  */
 @JNINamespace("media")
 @MainDex
 @SuppressLint("WrongConstant")
 @TargetApi(Build.VERSION_CODES.KITKAT)
 public class MediaDrmBridge {
     // Implementation Notes:
     // - A media crypto session (mMediaCryptoSession) is opened after MediaDrm
     //   is created. This session will NOT be added to mSessionIds and will only
     //   be used to create the MediaCrypto object.
@@ skipping 1011 matching lines @@
             long nativeMediaDrmBridge, byte[] sessionId, int requestType, byte[] message);
     private native void nativeOnSessionClosed(long nativeMediaDrmBridge, byte[] sessionId);
     private native void nativeOnSessionKeysChange(long nativeMediaDrmBridge, byte[] sessionId,
             Object[] keysInfo, boolean hasAdditionalUsableKey);
     private native void nativeOnSessionExpirationUpdate(
             long nativeMediaDrmBridge, byte[] sessionId, long expirationTime);
 
     private native void nativeOnResetDeviceCredentialsCompleted(
             long nativeMediaDrmBridge, boolean success);
 }