Added anti-singleton services (new process/thread per connection).

shell/context.cc

Index: shell/context.cc
diff --git a/shell/context.cc b/shell/context.cc
index abd30a1bb98fac86d931f4ca1f6e0d0a785fd26e..85f75fdf786a6cb5b58d54e64bf6af348c979252 100644
--- a/shell/context.cc
+++ b/shell/context.cc
@@ -194,6 +194,17 @@ void InitNativeOptions(ApplicationManager* manager,
   // configuring options for native apps.
   manager->GetNativeApplicationOptionsForURL(GURL("mojo:native_support"))
       ->allow_new_privs = true;
+  // All NaCl operations require a unique process
+  manager->GetNativeApplicationOptionsForURL(GURL("mojo:pnacl_compile"))
+      ->force_unique_process = true;
+  manager->GetNativeApplicationOptionsForURL(GURL("mojo:pnacl_link"))
+      ->force_unique_process = true;
+  manager->GetNativeApplicationOptionsForURL(
+             GURL("mojo:content_handler_nonsfi_pexe"))
+      ->force_unique_process = true;
+  manager->GetNativeApplicationOptionsForURL(
+             GURL("mojo:content_handler_nonsfi_nexe"))
+      ->force_unique_process = true;
 }
 
 class TracingServiceProvider : public ServiceProvider {