[DevTools] Do not add latency for pushed resources when throttling

chrome/browser/devtools/devtools_network_transaction.cc

Index: chrome/browser/devtools/devtools_network_transaction.cc
diff --git a/chrome/browser/devtools/devtools_network_transaction.cc b/chrome/browser/devtools/devtools_network_transaction.cc
index 710d4cf29ad7c33090dc233a45e2e60a43b051e8..71d37be213579276caa86d2cbdf34a14e34b6764 100644
--- a/chrome/browser/devtools/devtools_network_transaction.cc
+++ b/chrome/browser/devtools/devtools_network_transaction.cc
@@ -60,8 +60,11 @@ int DevToolsNetworkTransaction::Throttle(
   if (start) {
     throttled_byte_count_ += network_transaction_->GetTotalReceivedBytes();
     net::LoadTimingInfo load_timing_info;
-    if (GetLoadTimingInfo(&load_timing_info))
+    if (GetLoadTimingInfo(&load_timing_info)) {
       send_end = load_timing_info.send_end;
+      if (!load_timing_info.push_start.is_null())
+        start = false;
+    }
     if (send_end.is_null())
       send_end = base::TimeTicks::Now();
   }