Move EnableSpdy from HttpNetworkLayer to IOThread.

chrome/browser/chrome_benchmarking_message_filter.cc

Index: chrome/browser/chrome_benchmarking_message_filter.cc
diff --git a/chrome/browser/chrome_benchmarking_message_filter.cc b/chrome/browser/chrome_benchmarking_message_filter.cc
index 4e7c5f5ecfa3e64d7eddcbd0a44fc963c64061fb..5be4df1abc3d10747f780f65037c2453eba58e6b 100644
--- a/chrome/browser/chrome_benchmarking_message_filter.cc
+++ b/chrome/browser/chrome_benchmarking_message_filter.cc
@@ -113,7 +113,7 @@ void ChromeBenchmarkingMessageFilter::OnEnableSpdy(bool enable) {
   }
   if (enable) {
     net::HttpStreamFactory::EnableNpnSpdy();
-    net::HttpNetworkLayer::EnableSpdy("force-alt-protocols");
+    net::HttpNetworkLayer::ForceAlternateProtocol();
   } else {
     net::HttpStreamFactory::EnableNpnHttpOnly();
   }
@@ -167,4 +167,3 @@ bool ChromeBenchmarkingMessageFilter::CheckBenchmarkingEnabled() const {
   }
   return result;
 }
-