Implement MediaMetadata artwork in content

content/browser/android/web_contents_observer_proxy.cc

Index: content/browser/android/web_contents_observer_proxy.cc
diff --git a/content/browser/android/web_contents_observer_proxy.cc b/content/browser/android/web_contents_observer_proxy.cc
index dfa52cfb2112afb760c33379abdd1dc26136607c..3086165b983b353ce47da90b7907d2758467324c 100644
--- a/content/browser/android/web_contents_observer_proxy.cc
+++ b/content/browser/android/web_contents_observer_proxy.cc
@@ -310,16 +310,25 @@ void WebContentsObserverProxy::DidStartNavigationToPendingEntry(
 
 void WebContentsObserverProxy::MediaSessionStateChanged(
     bool is_controllable,
-    bool is_suspended,
-    const MediaMetadata& metadata) {
+    bool is_suspended) {
+  JNIEnv* env = AttachCurrentThread();
+
+  ScopedJavaLocalRef<jobject> obj(java_observer_);
+
+  Java_WebContentsObserverProxy_mediaSessionStateChanged(
+      env, obj.obj(), is_controllable, is_suspended);
+}
+
+void WebContentsObserverProxy::MediaMetadataChanged(
+    const MediaMetadata &metadata) {
   JNIEnv* env = AttachCurrentThread();
 
   ScopedJavaLocalRef<jobject> obj(java_observer_);
   ScopedJavaLocalRef<jobject> j_metadata =
       MediaMetadataAndroid::CreateJavaObject(env, metadata);
 
-  Java_WebContentsObserverProxy_mediaSessionStateChanged(
-      env, obj.obj(), is_controllable, is_suspended, j_metadata.obj());
+  Java_WebContentsObserverProxy_mediaMetadataChanged(
+      env, obj.obj(), j_metadata.obj());
 }
 
 void WebContentsObserverProxy::SetToBaseURLForDataURLIfNeeded(