Implement MediaMetadata artwork in content

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 3743 matching lines @@
     return;
 
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DidUpdateFaviconURL(candidates));
 }
 
 void WebContentsImpl::OnMediaSessionStateChanged() {
   MediaSession* session = MediaSession::Get(this);
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     MediaSessionStateChanged(session->IsControllable(),
-                                             session->IsSuspended(),
-                                             session->metadata()));
+                                             session->IsSuspended()));
 }
 
 void WebContentsImpl::ResumeMediaSession() {
   MediaSession::Get(this)->Resume(MediaSession::SuspendType::UI);
 }
 
 void WebContentsImpl::SuspendMediaSession() {
   MediaSession::Get(this)->Suspend(MediaSession::SuspendType::UI);
 }
 
 void WebContentsImpl::StopMediaSession() {
   MediaSession::Get(this)->Stop(MediaSession::SuspendType::UI);
 }
 
+void WebContentsImpl::OnMediaMetadataChanged() {
+  MediaSession* session = MediaSession::Get(this);
+  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
+                    MediaMetadataChanged(session->metadata()));
+}
+
 void WebContentsImpl::OnFirstVisuallyNonEmptyPaint() {
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DidFirstVisuallyNonEmptyPaint());
 
   did_first_visually_non_empty_paint_ = true;
 
   if (theme_color_ != last_sent_theme_color_) {
     // Theme color should have updated by now if there was one.
     FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                       DidChangeThemeColor(theme_color_));
@@ skipping 1272 matching lines @@
   for (RenderViewHost* render_view_host : render_view_host_set)
     render_view_host->OnWebkitPreferencesChanged();
 }
 
 void WebContentsImpl::SetJavaScriptDialogManagerForTesting(
     JavaScriptDialogManager* dialog_manager) {
   dialog_manager_ = dialog_manager;
 }
 
 }  // namespace content