[Reland] Post loading tasks on the appropriate WebFrameScheduler's queue

content/child/resource_dispatcher.h

Index: content/child/resource_dispatcher.h
diff --git a/content/child/resource_dispatcher.h b/content/child/resource_dispatcher.h
index 864b081ddca15f45ce9704dd16e205055685bdb5..2228d026ea7eaf5e1ff75ba40751f6b3dd019c56 100644
--- a/content/child/resource_dispatcher.h
+++ b/content/child/resource_dispatcher.h
@@ -136,12 +136,14 @@ class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
   struct PendingRequestInfo {
     PendingRequestInfo();
 
-    PendingRequestInfo(RequestPeer* peer,
-                       ResourceType resource_type,
-                       int origin_pid,
-                       const GURL& frame_origin,
-                       const GURL& request_url,
-                       bool download_to_file);
+    PendingRequestInfo(
+        RequestPeer* peer,
+        ResourceType resource_type,
+        int origin_pid,
+        const GURL& frame_origin,
+        const GURL& request_url,
+        bool download_to_file,
+        scoped_refptr<base::SingleThreadTaskRunner> loading_task_queue);
 
     ~PendingRequestInfo();
 
@@ -169,6 +171,7 @@ class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
     scoped_refptr<SharedMemoryReceivedDataFactory> received_data_factory;
     linked_ptr<SiteIsolationResponseMetaData> site_isolation_metadata;
     int buffer_size;
+    scoped_refptr<base::SingleThreadTaskRunner> loading_task_queue;
   };
   typedef base::hash_map<int, PendingRequestInfo> PendingRequestList;