[Cronet] Retain block passed to setRequestFilterBlock on iOS.

components/cronet/ios/test/test_server.cc

Index: components/cronet/ios/test/test_server.cc
diff --git a/components/cronet/ios/test/test_server.cc b/components/cronet/ios/test/test_server.cc
index f4d8d137648e03684570b6cdd83414369913e1c8..460d18d82a9cbba2dda62c336f87f08170723868 100644
--- a/components/cronet/ios/test/test_server.cc
+++ b/components/cronet/ios/test/test_server.cc
@@ -44,7 +44,7 @@ namespace cronet {
 bool TestServer::Start() {
   DCHECK(!g_test_server.get());
   g_test_server = base::MakeUnique<net::EmbeddedTestServer>(
-      net::EmbeddedTestServer::TYPE_HTTPS);
+      net::EmbeddedTestServer::TYPE_HTTP);
   g_test_server->RegisterRequestHandler(base::Bind(&EchoHeaderInRequest));
   CHECK(g_test_server->Start());
   return true;