Convert calls to the utility process in service code to use the zygote on Linux.

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 ea9bffc5636508a857a1176f21ebfb02aed7292f..aa44b9570f2c740ee003cac48ab92f60706e6446 100644
--- a/chrome/browser/web_resource/web_resource_service.cc
+++ b/chrome/browser/web_resource/web_resource_service.cc
@@ -194,6 +194,7 @@ class WebResourceService::UnpackerClient : public UtilityProcessHost::Client {
 
   void StartProcessOnIOThread(BrowserThread::ID thread_id) {
     UtilityProcessHost* host = new UtilityProcessHost(this, thread_id);
+    host->set_use_linux_zygote(true);
     // TODO(mrc): get proper file path when we start using web resources
     // that need to be unpacked.
     host->Send(new ChromeUtilityMsg_UnpackWebResource(json_data_));