Media Session API: use MediaMetadata in the browser process.

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 4b5b388ce16f7e1b7c83e08f99d2fe1b999aafb8..afee749e3d52dc0b88d83f81b78b39d3b8ec3096 100644
--- a/content/browser/android/web_contents_observer_proxy.cc
+++ b/content/browser/android/web_contents_observer_proxy.cc
@@ -11,6 +11,7 @@
 #include "base/android/scoped_java_ref.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
+#include "content/common/android/media_metadata_proxy.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/navigation_handle.h"
@@ -302,14 +303,18 @@ void WebContentsObserverProxy::DidStartNavigationToPendingEntry(
       env, obj.obj(), jstring_url.obj());
 }
 
-void WebContentsObserverProxy::MediaSessionStateChanged(bool is_controllable,
-                                                        bool is_suspended) {
+void WebContentsObserverProxy::MediaSessionStateChanged(
+    bool is_controllable,
+    bool is_suspended,
+    const MediaMetadata& metadata) {
   JNIEnv* env = AttachCurrentThread();
 
   ScopedJavaLocalRef<jobject> obj(java_observer_);
+  ScopedJavaLocalRef<jobject> j_metadata =
+      MediaMetadataProxy::GetJavaObject(env, metadata);
 
   Java_WebContentsObserverProxy_mediaSessionStateChanged(
-      env, obj.obj(), is_controllable, is_suspended);
+      env, obj.obj(), is_controllable, is_suspended, j_metadata.obj());
 }
 
 void WebContentsObserverProxy::SetToBaseURLForDataURLIfNeeded(