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

chrome/browser/extensions/webstore_inline_installer.cc

Index: chrome/browser/extensions/webstore_inline_installer.cc
diff --git a/chrome/browser/extensions/webstore_inline_installer.cc b/chrome/browser/extensions/webstore_inline_installer.cc
index 30f28fec7549ececd989a1394c1bd26f31642f0f..087f4356e68d21780ced6b310ea0027a170f4620 100644
--- a/chrome/browser/extensions/webstore_inline_installer.cc
+++ b/chrome/browser/extensions/webstore_inline_installer.cc
@@ -73,6 +73,7 @@ class SafeWebstoreResponseParser : public UtilityProcessHost::Client {
   void StartWorkOnIOThread() {
     CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
     utility_host_ = new UtilityProcessHost(this, BrowserThread::IO);
+    utility_host_->set_use_linux_zygote(true);
     utility_host_->Send(new ChromeUtilityMsg_ParseJSON(webstore_data_));
   }