Implementation of network level throttler.

net/http/http_network_session_peer.cc

Index: net/http/http_network_session_peer.cc
diff --git a/net/http/http_network_session_peer.cc b/net/http/http_network_session_peer.cc
index df729762345db77e15d28a8b23210cda78e2eea3..90c137281790240bb043a5bedaf6d69ad344206a 100644
--- a/net/http/http_network_session_peer.cc
+++ b/net/http/http_network_session_peer.cc
@@ -4,6 +4,7 @@
 
 #include "net/http/http_network_session_peer.h"
 
+#include "net/base/network_stream_throttler.h"
 #include "net/http/http_network_session.h"
 #include "net/http/http_proxy_client_socket_pool.h"
 #include "net/proxy/proxy_service.h"
@@ -38,4 +39,9 @@ void HttpNetworkSessionPeer::SetHttpStreamFactoryForWebSocket(
   session_->http_stream_factory_for_websocket_.swap(http_stream_factory);
 }
 
+void HttpNetworkSessionPeer::SetNetworkStreamThrottler(
+    std::unique_ptr<NetworkStreamThrottler> network_stream_throttler) {
+  session_->network_stream_throttler_.swap(network_stream_throttler);
+}
+
 }  // namespace net