Fix flake in chrome_frame_net_tests due to improper use of IE configurator.

chrome_frame/test/net/fake_external_tab.cc

Index: chrome_frame/test/net/fake_external_tab.cc
diff --git a/chrome_frame/test/net/fake_external_tab.cc b/chrome_frame/test/net/fake_external_tab.cc
index 18914fd18a975873ecf0ab122a8e4af87d17192d..6a6a88481e0ed5a3536c9f5240fd0c8f169e1e14 100644
--- a/chrome_frame/test/net/fake_external_tab.cc
+++ b/chrome_frame/test/net/fake_external_tab.cc
@@ -518,8 +518,10 @@ void CFUrlRequestUnittestRunner::StartChromeFrameInHostBrowser() {
 
   // Tweak IE settings to make it amenable to testing before launching it.
   ie_configurator_.reset(chrome_frame_test::CreateConfigurator());
-  if (ie_configurator_.get() != NULL)
+  if (ie_configurator_.get() != NULL) {
+    ie_configurator_->Initialize();
     ie_configurator_->ApplySettings();
+  }
 
   test_http_server_.reset(new test_server::SimpleWebServer(kTestServerPort));
   test_http_server_->AddResponse(&chrome_frame_html_);