Revert of [Prerender] Restore request priorities when swapped in

content/browser/loader/resource_scheduler.cc

Index: content/browser/loader/resource_scheduler.cc
diff --git a/content/browser/loader/resource_scheduler.cc b/content/browser/loader/resource_scheduler.cc
index d653c7246944fb8f084e2f3d9ee437e13ba22e9f..e1dcb0aa04ae1c3f52ee34e4c4ee2f09ced62df1 100644
--- a/content/browser/loader/resource_scheduler.cc
+++ b/content/browser/loader/resource_scheduler.cc
@@ -237,9 +237,8 @@
   }
 
   static ScheduledResourceRequest* ForRequest(net::URLRequest* request) {
-    UnownedPointer* pointer =
-        static_cast<UnownedPointer*>(request->GetUserData(kUserDataKey));
-    return pointer ? pointer->get() : nullptr;
+    return static_cast<UnownedPointer*>(request->GetUserData(kUserDataKey))
+        ->get();
   }
 
   // Starts the request. If |start_mode| is START_ASYNC, the request will not
@@ -1081,17 +1080,6 @@
                               new_priority_params);
 }
 
-void ResourceScheduler::ReprioritizeRequest(net::URLRequest* request,
-                                            net::RequestPriority new_priority) {
-  int current_intra_priority = 0;
-  auto* existing_request = ScheduledResourceRequest::ForRequest(request);
-  if (existing_request) {
-    current_intra_priority =
-        existing_request->get_request_priority_params().intra_priority;
-  }
-  ReprioritizeRequest(request, new_priority, current_intra_priority);
-}
-
 ResourceScheduler::ClientId ResourceScheduler::MakeClientId(
     int child_id, int route_id) {
   return (static_cast<ResourceScheduler::ClientId>(child_id) << 32) | route_id;