Add a flag to LaunchSelLdr to skip grabbing a routing_id.

chrome/browser/nacl_host/nacl_process_host.cc

Index: chrome/browser/nacl_host/nacl_process_host.cc
diff --git a/chrome/browser/nacl_host/nacl_process_host.cc b/chrome/browser/nacl_host/nacl_process_host.cc
index c854c1a0e815550308e6aa845e7fcdde6fb24b4b..3e004e5f5c316b6f9b8f2bc6aa7edec76c832c64 100644
--- a/chrome/browser/nacl_host/nacl_process_host.cc
+++ b/chrome/browser/nacl_host/nacl_process_host.cc
@@ -177,6 +177,10 @@ NaClProcessHost::NaClProcessHost(const GURL& manifest_url,
 
   enable_ipc_proxy_ = !CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableNaClSRPCProxy);
+  // If render_view_id == 0 we do not need PPAPI, so we can skip
+  // PPAPI IPC proxy channel creation, etc.
+  if (!render_view_id_)
+    enable_ipc_proxy_ = false;
 }
 
 NaClProcessHost::~NaClProcessHost() {