Make URLRequestThrottlerManager a member of URLRequestContext.

remoting/host/url_request_context.cc

Index: remoting/host/url_request_context.cc
diff --git a/remoting/host/url_request_context.cc b/remoting/host/url_request_context.cc
index 901dc092a0dc061fa232096fe4ba240365569f4e..d9f50f2a91bdbcc978263f504247c7b1c85158e5 100644
--- a/remoting/host/url_request_context.cc
+++ b/remoting/host/url_request_context.cc
@@ -14,6 +14,7 @@
 #include "net/http/http_server_properties_impl.h"
 #include "net/proxy/proxy_config_service.h"
 #include "net/proxy/proxy_service.h"
+#include "net/url_request/url_request_throttler_manager.h"
 #include "remoting/host/vlog_net_log.h"
 
 #if defined(OS_WIN)
@@ -93,6 +94,7 @@ URLRequestContext::URLRequestContext(
   storage_.set_http_auth_handler_factory(
       net::HttpAuthHandlerFactory::CreateDefault(host_resolver()));
   storage_.set_http_server_properties(new net::HttpServerPropertiesImpl);
+  storage_.set_throttler_manager(new net::URLRequestThrottlerManager);
 
   net::HttpNetworkSession::Params session_params;
   session_params.host_resolver = host_resolver();