Link MediaSessionTabHelper with native MediaSession [CL is going to be split]

content/public/android/java/src/org/chromium/content_public/browser/WebContents.java

Index: content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
diff --git a/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java b/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
index fce0c95cb94d940e84e1b6b57e67e9306d1de840..8f737557863706fa3ed09301d2a23b0f3b0030ed 100644
--- a/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
+++ b/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
@@ -307,19 +307,11 @@ public interface WebContents extends Parcelable {
     void requestAccessibilitySnapshot(AccessibilitySnapshotCallback callback);
 
     /**
-     * Resumes the current media session.
+     * Add a {@link MediaSessionDelegate} to the native {@link MediaSession} of this
+     * {@link WebContents} object.
+     * @param delegate The delegate to be added to the native {@link MediaSession}
      */
-    void resumeMediaSession();
-
-    /**
-     * Suspends the current media session.
-     */
-    void suspendMediaSession();
-
-    /**
-     * Stops the current media session.
-     */
-    void stopMediaSession();
+    void addMediaSessionDelegate(MediaSessionDelegate delegate);
 
     /**
      * Add an observer to the WebContents