Make URLRequestThrottlerManager a member of URLRequestContext.

net/url_request/url_request_test_util.cc

Index: net/url_request/url_request_test_util.cc
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index 5fc4f727d311e8dcf39bce445cae474b941d10a8..98bb7668e99530b64cc95509e556a7d7eb3e59c1 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -15,6 +15,7 @@
 #include "net/http/http_network_session.h"
 #include "net/http/http_server_properties_impl.h"
 #include "net/url_request/url_request_job_factory.h"
+#include "net/url_request/url_request_throttler_manager.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
@@ -156,6 +157,10 @@ void TestURLRequestContext::Init() {
     set_accept_charset("iso-8859-1,*,utf-8");
   if (!job_factory())
     context_storage_.set_job_factory(new net::URLRequestJobFactory);
+  if (!throttler_manager()) {
+    context_storage_.set_throttler_manager(
+        new net::URLRequestThrottlerManager());
+  }
 }