Port messages sent by WebIDBCursorImpl to Mojo.

content/child/indexed_db/webidbdatabase_impl.h

Index: content/child/indexed_db/webidbdatabase_impl.h
diff --git a/content/child/indexed_db/webidbdatabase_impl.h b/content/child/indexed_db/webidbdatabase_impl.h
index e8a04e3e9a6392d8200c079b85e7d3f4d5b9415d..e13aeefc782fab22ae822a1e1d3ae545d0305ae6 100644
--- a/content/child/indexed_db/webidbdatabase_impl.h
+++ b/content/child/indexed_db/webidbdatabase_impl.h
@@ -25,14 +25,12 @@ class WebString;
 }
 
 namespace content {
-class ThreadSafeSender;
 
 class CONTENT_EXPORT WebIDBDatabaseImpl
     : public NON_EXPORTED_BASE(blink::WebIDBDatabase) {
  public:
   WebIDBDatabaseImpl(indexed_db::mojom::DatabaseAssociatedPtrInfo database,
-                     scoped_refptr<base::SingleThreadTaskRunner> io_runner,
-                     scoped_refptr<ThreadSafeSender> thread_safe_sender);
+                     scoped_refptr<base::SingleThreadTaskRunner> io_runner);
   ~WebIDBDatabaseImpl() override;
 
   // blink::WebIDBDatabase
@@ -142,7 +140,6 @@ class CONTENT_EXPORT WebIDBDatabaseImpl
   IOThreadHelper* helper_;
   std::set<int32_t> observer_ids_;
   scoped_refptr<base::SingleThreadTaskRunner> io_runner_;
-  scoped_refptr<ThreadSafeSender> thread_safe_sender_;
 };
 
 }  // namespace content