[Android] Java Bridge: handle requests from Java Script on the background thread

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index b92406485130bb1b4e615cec8bd570c04cb176c9..ccacd7c612898a6afb598cabc7b04cc8d89afa28 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -341,8 +341,7 @@ class ContentViewCoreImpl : public ContentViewCore,
   bool accessibility_enabled_;
 
   // Manages injecting Java objects.
-  scoped_ptr<GinJavaBridgeDispatcherHost>
-      java_bridge_dispatcher_host_;
+  scoped_refptr<GinJavaBridgeDispatcherHost> java_bridge_dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentViewCoreImpl);
 };