Convert uses of int ms to TimeDelta in chrome/browser and net.

chrome/browser/metrics/metrics_service.cc

Index: chrome/browser/metrics/metrics_service.cc
diff --git a/chrome/browser/metrics/metrics_service.cc b/chrome/browser/metrics/metrics_service.cc
index 28ab192e123365c8cffd24130882a93ad4646f12..a71f8c6581a9a11af5ac0f00cba5f729a6943621 100644
--- a/chrome/browser/metrics/metrics_service.cc
+++ b/chrome/browser/metrics/metrics_service.cc
@@ -834,7 +834,7 @@ void MetricsService::StartRecording() {
         base::Bind(&MetricsService::InitTaskGetHardwareClass,
             self_ptr_factory_.GetWeakPtr(),
             MessageLoop::current()->message_loop_proxy()),
-        kInitializationDelaySeconds);
+        base::TimeDelta::FromSeconds(kInitializationDelaySeconds));
   }
 }
 
@@ -943,7 +943,7 @@ void MetricsService::OnMemoryDetailCollectionDone() {
   // calling us back on the task.
   HistogramSynchronizer::FetchRendererHistogramsAsynchronously(
       MessageLoop::current(), callback,
-      kMaxHistogramGatheringWaitDuration);
+      base::TimeDelta::FromMilliseconds(kMaxHistogramGatheringWaitDuration));
 }
 
 void MetricsService::OnHistogramSynchronizationDone() {