Implement MediaMetadata artwork in content

content/renderer/media/android/renderer_media_session_manager.cc

 // Copyright 2015 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/renderer/media/android/renderer_media_session_manager.h"
 
 #include "base/logging.h"
+#include "content/common/media/media_metadata_sanitizer.h"
 #include "content/common/media/media_session_messages_android.h"
 #include "content/public/common/media_metadata.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/renderer/media/android/webmediasession_android.h"
 
 namespace content {
 
 RendererMediaSessionManager::RendererMediaSessionManager(
     RenderFrame* render_frame)
     : RenderFrameObserver(render_frame),
@@ skipping 40 matching lines @@
     int session_id,
     std::unique_ptr<blink::WebMediaSessionDeactivateCallback> callback) {
   int request_id = pending_deactivation_requests_.Add(callback.release());
   Send(
       new MediaSessionHostMsg_Deactivate(routing_id(), session_id, request_id));
 }
 
 void RendererMediaSessionManager::SetMetadata(
     int session_id,
     const MediaMetadata& metadata) {
-  // Apply some sanity checks on the MediaMetadata before sending over IPC.
-  MediaMetadata ipc_metadata;
-  ipc_metadata.title =
-      metadata.title.substr(0, MediaMetadata::kMaxIPCStringLength);
-  ipc_metadata.artist =
-      metadata.artist.substr(0, MediaMetadata::kMaxIPCStringLength);
-  ipc_metadata.album =
-      metadata.album.substr(0, MediaMetadata::kMaxIPCStringLength);
 
-  Send(new MediaSessionHostMsg_SetMetadata(routing_id(),
-                                           session_id,
-                                           ipc_metadata));
+  // TODO(zqzhang): print a console warning when metadata is dirty. See
+  // https://crbug.com/625244.
+  Send(new MediaSessionHostMsg_SetMetadata(
+      routing_id(), session_id,
+      MediaMetadataSanitizer::CheckSanity(metadata) ?
+      metadata : MediaMetadataSanitizer::Sanitize(metadata)));
 }
 
 void RendererMediaSessionManager::OnDidActivate(int request_id, bool success) {
   DCHECK(pending_activation_requests_.Lookup(request_id)) << request_id;
   blink::WebMediaSessionActivateCallback* callback =
       pending_activation_requests_.Lookup(request_id);
   if (success) {
     callback->onSuccess();
   } else {
     callback->onError(
         blink::WebMediaSessionError(blink::WebMediaSessionError::Activate));
   }
   pending_activation_requests_.Remove(request_id);
 }
 
 void RendererMediaSessionManager::OnDidDeactivate(int request_id) {
   DCHECK(pending_deactivation_requests_.Lookup(request_id)) << request_id;
   pending_deactivation_requests_.Lookup(request_id)->onSuccess();
   pending_deactivation_requests_.Remove(request_id);
 }
 
 }  // namespace content