Simplify ExtensionProcessManager to only load extension background pages when a browser window is o…

chrome/browser/extensions/extension_process_manager.h

Index: chrome/browser/extensions/extension_process_manager.h
===================================================================
--- chrome/browser/extensions/extension_process_manager.h	(revision 193114)
+++ chrome/browser/extensions/extension_process_manager.h	(working copy)
@@ -195,11 +195,6 @@
   // Clears background page data for this extension.
   void ClearBackgroundPageData(const std::string& extension_id);
 
-  // Returns true if loading background pages should be deferred. This is
-  // true if there are no browser windows open and the browser process was
-  // started to show the app launcher.
-  bool DeferLoadingBackgroundHosts() const;
-
   // Contains all active extension-related RenderViewHost instances for all
   // extensions. We also keep a cache of the host's view type, because that
   // information is not accessible at registration/deregistration time.