Upstream Chrome for Android Cast.

chrome/android/java/src/org/chromium/chrome/browser/media/remote/LockScreenTransportControlV18.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/remote/LockScreenTransportControlV18.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/LockScreenTransportControlV18.java b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/LockScreenTransportControlV18.java
new file mode 100644
index 0000000000000000000000000000000000000000..4bbee83acf34674175564f067421925d5356134c
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/LockScreenTransportControlV18.java
@@ -0,0 +1,80 @@
+// Copyright 2014 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.chrome.browser.media.remote;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+
+/**
+ * An implementation of {@link LockScreenTransportControl} targeting platforms with an API greater
+ * than 17. Extends {@link LockScreenTransportControlV16}, adding support for seeking.
+ */
+@TargetApi(18)
+// This whole class is based upon RemoteControlClient, which is deprecated (and non-functional) in
+// the Android L SDK. Once the L SDK is released we will add code in LockSceenTransportControl to
+// prevent the use of this class on Android L. See {@link LockScreenTransportControl}.
+@SuppressWarnings("deprecation")
+class LockScreenTransportControlV18 extends LockScreenTransportControlV16 {
+
+    private final PlaybackPositionUpdateListener mPlaybackPositionUpdateListener;
+    private final GetPlaybackPositionUpdateListener mGetPlaybackPositionUpdateListener;
+
+    LockScreenTransportControlV18(Context context) {
+        super(context);
+        mPlaybackPositionUpdateListener = new PlaybackPositionUpdateListener();
+        mGetPlaybackPositionUpdateListener = new GetPlaybackPositionUpdateListener();
+    }
+
+    @Override
+    protected void register() {
+        super.register();
+        getRemoteControlClient().setPlaybackPositionUpdateListener(mPlaybackPositionUpdateListener);
+        getRemoteControlClient().setOnGetPlaybackPositionListener(
+                mGetPlaybackPositionUpdateListener);
+    }
+
+    @Override
+    protected void unregister() {
+        getRemoteControlClient().setOnGetPlaybackPositionListener(null);
+        getRemoteControlClient().setPlaybackPositionUpdateListener(null);
+        super.unregister();
+    }
+
+    @Override
+    protected void updatePlaybackState(int state) {
+        RemoteVideoInfo videoInfo = getVideoInfo();
+        if (videoInfo != null && getRemoteControlClient() != null) {
+            getRemoteControlClient().setPlaybackState(state, videoInfo.currentTimeMillis, 1.0f);
+        } else {
+            super.updatePlaybackState(state);
+        }
+    }
+
+    @Override
+    protected int getTransportControlFlags() {
+        return super.getTransportControlFlags()
+                | android.media.RemoteControlClient.FLAG_KEY_MEDIA_POSITION_UPDATE;
+    }
+
+    private class GetPlaybackPositionUpdateListener implements
+            android.media.RemoteControlClient.OnGetPlaybackPositionListener {
+
+        @Override
+        public long onGetPlaybackPosition() {
+            RemoteVideoInfo videoInfo = getVideoInfo();
+            return videoInfo == null ? 0 : videoInfo.currentTimeMillis;
+        }
+    }
+
+    private class PlaybackPositionUpdateListener implements
+            android.media.RemoteControlClient.OnPlaybackPositionUpdateListener {
+
+        @Override
+        public void onPlaybackPositionUpdate(long position) {
+            for (Listener listener : getListeners())
+                listener.onSeek((int) position);
+        }
+    }
+}