Use MediaMetadata artwork in MediaNotification [NOT READY]

chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaSessionTabHelper.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaSessionTabHelper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaSessionTabHelper.java b/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaSessionTabHelper.java
index d69aa18d31432d9ed7ad9b12c1c814255aeb3b84..1fac0248cfc5145f68d4c98c745e0af98dba8d08 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaSessionTabHelper.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaSessionTabHelper.java
@@ -7,6 +7,7 @@ package org.chromium.chrome.browser.media.ui;
 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
+import android.graphics.Rect;
 import android.media.AudioManager;
 import android.text.TextUtils;
 
@@ -19,6 +20,7 @@ import org.chromium.chrome.browser.tab.EmptyTabObserver;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tab.TabObserver;
 import org.chromium.components.url_formatter.UrlFormatter;
+import org.chromium.content_public.browser.ImageDownloadCallback;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_public.browser.WebContentsObserver;
 import org.chromium.content_public.common.MediaMetadata;
@@ -26,6 +28,7 @@ import org.chromium.ui.base.WindowAndroid;
 
 import java.net.URI;
 import java.net.URISyntaxException;
+import java.util.List;
 
 /**
  * A tab helper responsible for enabling/disabling media controls and passing
@@ -46,6 +49,25 @@ public class MediaSessionTabHelper {
     private MediaNotificationInfo.Builder mNotificationInfoBuilder = null;
     private MediaMetadata mFallbackMetadata;
 
+    private ImageDownloadCallback mImageDownloadCallback = new ImageDownloadCallback() {
+            @Override
+            public void onFinishDownloadImage(int id, int httpStatusCode, String imageUrl,
+                    List<Bitmap> bitmaps, List<Rect> sizes) {
+                Log.i(TAG, "====== image downloaded ======");
+                Log.i(TAG, "id=" + Integer.toString(id));
+                Log.i(TAG, "httpStatusCode=" + Integer.toString(httpStatusCode));
+                Log.i(TAG, "imageUrl=" + imageUrl);
+                if (bitmaps.isEmpty()) {
+                  Log.i(TAG, "failed to retrive image");
+                  return;
+                }
+                if (mNotificationInfoBuilder == null) return;
+                mNotificationInfoBuilder.setLargeIcon(bitmaps.get(0));
+                MediaNotificationManager.show(
+                    ContextUtils.getApplicationContext(), mNotificationInfoBuilder.build());
+            }
+        };
+
     private MediaNotificationListener mControlsListener = new MediaNotificationListener() {
         @Override
         public void onPlay(int actionSource) {
@@ -100,6 +122,16 @@ public class MediaSessionTabHelper {
                     return;
                 }
 
+                if (metadata != null && !metadata.getArtwork().isEmpty()) {
+                  Log.i(TAG, "mediaSessionStateChanged(): downloading image");
+                  mTab.getWebContents().downloadImage(
+                      metadata.getArtwork().get(0).getSrc(),
+                      false, 1024, false, mImageDownloadCallback);
+                } else {
+                  if (metadata == null) Log.i(TAG, "metadata is null");
+                  else if (metadata.getArtwork().isEmpty()) Log.i(TAG, "artwork empty");
+                }
+
                 mFallbackMetadata = null;
 
                 // The page's title is used as a placeholder if no title is specified in the