Simple fix so the utility process respects single process mode.

chrome/browser/web_resource/web_resource_service.cc

Index: chrome/browser/web_resource/web_resource_service.cc
diff --git a/chrome/browser/web_resource/web_resource_service.cc b/chrome/browser/web_resource/web_resource_service.cc
index 7e56c9f38f27496267cccf19eb7eafad5d01ba56..07db52377a32f9af8a061f483ffd60ac7a94b328 100644
--- a/chrome/browser/web_resource/web_resource_service.cc
+++ b/chrome/browser/web_resource/web_resource_service.cc
@@ -106,7 +106,8 @@ class WebResourceService::UnpackerClient
     // If we don't have a resource_dispatcher_host_, assume we're in
     // a test and run the unpacker directly in-process.
     bool use_utility_process =
-        web_resource_service_->resource_dispatcher_host_ != NULL;
+        web_resource_service_->resource_dispatcher_host_ != NULL &&
+        !CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess);
 
 #if defined(OS_POSIX)
     // TODO(port): Don't use a utility process on linux (crbug.com/22703) or