Implement MediaMetadata artwork in content

content/renderer/media/android/renderer_media_session_manager.cc

Index: content/renderer/media/android/renderer_media_session_manager.cc
diff --git a/content/renderer/media/android/renderer_media_session_manager.cc b/content/renderer/media/android/renderer_media_session_manager.cc
index b5331c7472a30cacc4582ef5b350b0a0c67a6615..da956eced8f2b9f819e53f15287e3ae5ee6b5c55 100644
--- a/content/renderer/media/android/renderer_media_session_manager.cc
+++ b/content/renderer/media/android/renderer_media_session_manager.cc
@@ -5,6 +5,7 @@
 #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"
@@ -65,18 +66,13 @@ void RendererMediaSessionManager::Deactivate(
 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) {