Media Session API: use MediaMetadata in the browser process.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/media/remote/CastNotificationControl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/CastNotificationControl.java b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/CastNotificationControl.java
index 9864d7b4a7c49e0d91c2a2c06916b5eeba3eebe8..bb8ab9b481e780c6c6af37bc261479425c5da4de 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/CastNotificationControl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/CastNotificationControl.java
@@ -16,6 +16,7 @@ import org.chromium.chrome.browser.media.ui.MediaNotificationInfo;
 import org.chromium.chrome.browser.media.ui.MediaNotificationListener;
 import org.chromium.chrome.browser.media.ui.MediaNotificationManager;
 import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.content_public.common.MediaMetadata;
 
 import javax.annotation.Nullable;
 
@@ -117,7 +118,7 @@ public class CastNotificationControl implements MediaRouteController.UiListener,
     }
 
     private void updateNotification() {
-        mNotificationBuilder.setTitle(mTitle);
+        mNotificationBuilder.setMetadata(new MediaMetadata(mTitle, "", ""));

[Ted C, 2016/03/01 17:18:11]

why the empty string and not null?

Is there a requirement that the fields are non-null?

[mlamouri (slow - plz ping), 2016/03/16 15:47:15]

The C++ class is using empty string as a default value so I would prefer to keep
that in the Java class.

[Ted C, 2016/03/16 16:55:58]

Acknowledged.

         if (mState == PlayerState.PAUSED || mState == PlayerState.PLAYING) {
             mNotificationBuilder.setPaused(mState != PlayerState.PLAYING);
             mNotificationBuilder.setActions(MediaNotificationInfo.ACTION_STOP
@@ -208,4 +209,4 @@ public class CastNotificationControl implements MediaRouteController.UiListener,
     boolean isShowingForTests() {
         return mIsShowing;
     }
-}
+}