app_shell: Make renderer run background page JavaScript

apps/shell/shell_extension_system.h

Index: apps/shell/shell_extension_system.h
diff --git a/apps/shell/shell_extension_system.h b/apps/shell/shell_extension_system.h
index acc34f0b573ff7d1b0778f87973500d1de4fab96..a72e089431be3df49de974c026f7e7b29a94d3cd 100644
--- a/apps/shell/shell_extension_system.h
+++ b/apps/shell/shell_extension_system.h
@@ -20,6 +20,7 @@ class BrowserContext;
 namespace extensions {
 
 class EventRouter;
+class InfoMap;
 class LazyBackgroundTaskQueue;
 class ProcessManager;
 
@@ -63,6 +64,9 @@ class ShellExtensionSystem : public ExtensionSystem {
  private:
   content::BrowserContext* browser_context_;  // Not owned.
 
+  // Data to be accessed on the IO thread. Must outlive process_manager_.
+  scoped_refptr<InfoMap> info_map_;
+
   scoped_ptr<LazyBackgroundTaskQueue> lazy_background_task_queue_;
   scoped_ptr<EventRouter> event_router_;
   scoped_ptr<ProcessManager> process_manager_;