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

content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java

Index: content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
index 73aa41ce902e84547551dd476836384c00329398..f9aad522bb5dafe6b2cf4caf05d3c599dd9afb5e 100644
--- a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
+++ b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
@@ -24,6 +24,7 @@ import org.chromium.content_public.browser.AccessibilitySnapshotNode;
 import org.chromium.content_public.browser.ContentBitmapCallback;
 import org.chromium.content_public.browser.ImageDownloadCallback;
 import org.chromium.content_public.browser.JavaScriptCallback;
+import org.chromium.content_public.browser.MediaSessionDelegate;
 import org.chromium.content_public.browser.MessagePortService;
 import org.chromium.content_public.browser.NavigationController;
 import org.chromium.content_public.browser.WebContents;
@@ -373,18 +374,8 @@ import java.util.UUID;
     }
 
     @Override
-    public void resumeMediaSession() {
-        nativeResumeMediaSession(mNativeWebContentsAndroid);
-    }
-
-    @Override
-    public void suspendMediaSession() {
-        nativeSuspendMediaSession(mNativeWebContentsAndroid);
-    }
-
-    @Override
-    public void stopMediaSession() {
-        nativeStopMediaSession(mNativeWebContentsAndroid);
+    public void addMediaSessionDelegate(MediaSessionDelegate delegate) {
+        nativeAddMediaSessionDelegate(mNativeWebContentsAndroid, delegate);
     }
 
     // root node can be null if parsing fails.
@@ -547,9 +538,8 @@ import java.util.UUID;
     private native int nativeGetThemeColor(long nativeWebContentsAndroid);
     private native void nativeRequestAccessibilitySnapshot(
             long nativeWebContentsAndroid, AccessibilitySnapshotCallback callback);
-    private native void nativeResumeMediaSession(long nativeWebContentsAndroid);
-    private native void nativeSuspendMediaSession(long nativeWebContentsAndroid);
-    private native void nativeStopMediaSession(long nativeWebContentsAndroid);
+    private native void nativeAddMediaSessionDelegate(long nativeWebContentsAndroid,
+            MediaSessionDelegate delegate);
     private native void nativeGetContentBitmap(long nativeWebContentsAndroid,
             ContentBitmapCallback callback, Bitmap.Config config, float scale,
             float x, float y, float width, float height);