Implement MediaMetadata artwork in content

content/browser/media/android/browser_media_session_manager.cc

Index: content/browser/media/android/browser_media_session_manager.cc
diff --git a/content/browser/media/android/browser_media_session_manager.cc b/content/browser/media/android/browser_media_session_manager.cc
index a7e5fd5bbfa28e38fdeb8ac7290cacdf3c34f1ec..4e614ec1a9b644196af4836d7226faa3bf3fd497 100644
--- a/content/browser/media/android/browser_media_session_manager.cc
+++ b/content/browser/media/android/browser_media_session_manager.cc
@@ -4,6 +4,8 @@
 
 #include "content/browser/media/android/browser_media_session_manager.h"
 
+#include "content/browser/media/session/media_session.h"
+#include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/media/media_session_messages_android.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
@@ -37,13 +39,19 @@ void BrowserMediaSessionManager::OnSetMetadata(
       insecure_metadata.artist.substr(0, MediaMetadata::kMaxIPCStringLength);
   metadata.album =
       insecure_metadata.album.substr(0, MediaMetadata::kMaxIPCStringLength);
+  metadata.artworks = insecure_metadata.artworks;
 
   if (metadata != insecure_metadata) {
     render_frame_host_->GetProcess()->ShutdownForBadMessage();
     return;
   }
 
-  NOTIMPLEMENTED();
+  WebContentsImpl* contents = static_cast<WebContentsImpl*>(
+      WebContents::FromRenderFrameHost(render_frame_host_));
+  if (contents)
+    // TODO(zqzhang): many-to-one relationship between WebMediaSession
+    // & MediaSession?
+    MediaSession::Get(contents)->SetMetadata(metadata);

[mlamouri (slow - plz ping), 2016/06/10 10:54:58]

Better to leave this as-is. It should be plumbed when the API will be plumbed.
There was some work in that direction but it stalled.

[Zhiqiang Zhang (Slow), 2016/06/14 13:16:17]

Acknowledged.

 }
 
 int BrowserMediaSessionManager::GetRoutingID() const {