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

content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.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.content.browser.webcontents;
 
 import android.annotation.SuppressLint;
 import android.graphics.Bitmap;
 import android.graphics.Rect;
 import android.os.Bundle;
@@ skipping 354 matching lines @@
     @Override
     public int getThemeColor() {
         return nativeGetThemeColor(mNativeWebContentsAndroid);
     }
 
     @Override
     public void requestAccessibilitySnapshot(AccessibilitySnapshotCallback callback) {
         nativeRequestAccessibilitySnapshot(mNativeWebContentsAndroid, callback);
     }
 
-    @Override
-    public void resumeMediaSession() {
-        nativeResumeMediaSession(mNativeWebContentsAndroid);
-    }
-
-    @Override
-    public void suspendMediaSession() {
-        nativeSuspendMediaSession(mNativeWebContentsAndroid);
-    }
-
-    @Override
-    public void stopMediaSession() {
-        nativeStopMediaSession(mNativeWebContentsAndroid);
-    }
-
     // root node can be null if parsing fails.
     @CalledByNative
     private static void onAccessibilitySnapshot(AccessibilitySnapshotNode root,
             AccessibilitySnapshotCallback callback) {
         callback.onAccessibilitySnapshot(root);
     }
 
     @CalledByNative
     private static void addAccessibilityNodeAsChild(AccessibilitySnapshotNode parent,
             AccessibilitySnapshotNode child) {
@@ skipping 140 matching lines @@
             long nativeWebContentsAndroid, int level, String message);
     private native void nativePostMessageToFrame(long nativeWebContentsAndroid, String frameName,
             String message, String targetOrigin, int[] sentPortIds);
     private native void nativeCreateMessageChannel(
             long nativeWebContentsAndroid, AppWebMessagePort[] ports);
     private native boolean nativeHasAccessedInitialDocument(
             long nativeWebContentsAndroid);
     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 nativeGetContentBitmap(long nativeWebContentsAndroid,
             ContentBitmapCallback callback, Bitmap.Config config, float scale,
             float x, float y, float width, float height);
     private native void nativeReloadLoFiImages(long nativeWebContentsAndroid);
     private native int nativeDownloadImage(long nativeWebContentsAndroid,
             String url, boolean isFavicon, int maxBitmapSize,
             boolean bypassCache, ImageDownloadCallback callback);
 }