Make reprioritization IPC batch rather than per-request.

content/browser/loader/resource_dispatcher_host_impl.h

Index: content/browser/loader/resource_dispatcher_host_impl.h
diff --git a/content/browser/loader/resource_dispatcher_host_impl.h b/content/browser/loader/resource_dispatcher_host_impl.h
index 5d02f1d3ceac904e1011da5ae0b0d1cf06953064..fe8d766209ac8db94b72c1e924d0874db43d3c69 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.h
+++ b/content/browser/loader/resource_dispatcher_host_impl.h
@@ -28,6 +28,7 @@
 #include "content/browser/loader/global_routing_id.h"
 #include "content/browser/loader/resource_loader_delegate.h"
 #include "content/common/content_export.h"
+#include "content/common/resource_priority_change_info.h"
 #include "content/common/url_loader.mojom.h"
 #include "content/public/browser/global_request_id.h"
 #include "content/public/browser/resource_dispatcher_host.h"
@@ -624,10 +625,9 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   void OnCancelRequest(ResourceRequesterInfo* requester_info, int request_id);
   void OnReleaseDownloadedFile(ResourceRequesterInfo* requester_info,
                                int request_id);
-  void OnDidChangePriority(ResourceRequesterInfo* requester_info,
-                           int request_id,
-                           net::RequestPriority new_priority,
-                           int intra_priority_value);
+  void OnDidChangePriority(
+      ResourceRequesterInfo* requester_info,
+      const std::vector<ResourcePriorityChangeInfo>& priority_changes);
 
   // Creates ResourceRequestInfoImpl for a download or page save.
   // |download| should be true if the request is a file download.