[WIP] off-main-thread loading

content/child/resource_dispatcher.cc

Index: content/child/resource_dispatcher.cc
diff --git a/content/child/resource_dispatcher.cc b/content/child/resource_dispatcher.cc
index 46c4968d6b8ae75c365af546b211abf2a136f244..ac737fcc2a2562f2703f559ebe48bba31f10787e 100644
--- a/content/child/resource_dispatcher.cc
+++ b/content/child/resource_dispatcher.cc
@@ -8,6 +8,7 @@
 
 #include <utility>
 
+#include "base/atomic_sequence_num.h"
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/debug/alias.h"
@@ -67,8 +68,8 @@ int MakeRequestID() {
   // NOTE: The resource_dispatcher_host also needs probably unique
   // request_ids, so they count down from -2 (-1 is a special we're
   // screwed value), while the renderer process counts up.
-  static int next_request_id = 0;
-  return next_request_id++;
+  static base::StaticAtomicSequenceNumber sequence;
+  return sequence.GetNext();  // We start at zero.
 }
 
 void CheckSchemeForReferrerPolicy(const ResourceRequest& request) {