Only build various flash/pnacl/ppapi code when they are enabled.

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index 4899cc3e9b793dc10757b45213b461f428023353..6234faf31ef3c4b6ad6e487d1083f2f8f15945a1 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -276,8 +276,11 @@ class BrowserProcessImpl : public BrowserProcess,
   // but some users of component updater only install per-user.
   scoped_ptr<component_updater::ComponentUpdateService> component_updater_;
   scoped_refptr<CRLSetFetcher> crl_set_fetcher_;
+
+#if !defined(DISABLE_NACL)
   scoped_ptr<component_updater::PnaclComponentInstaller>
       pnacl_component_installer_;
+#endif
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   scoped_refptr<PluginsResourceService> plugins_resource_service_;