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

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
diff --git a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
index 641ea182807c25be3cd536f22800967306d79ba5..ba014ef840845daeea7849515ccf7d4f37dcf5cf 100644
--- a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
@@ -13,7 +13,6 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/component_updater/component_updater_resource_throttle.h"
-#include "chrome/browser/component_updater/pnacl/pnacl_component_installer.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/download/download_resource_throttle.h"
@@ -53,6 +52,10 @@
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
 
+#if !defined(DISABLE_NACL)
+#include "chrome/browser/component_updater/pnacl/pnacl_component_installer.h"
+#endif
+
 #if defined(ENABLE_CONFIGURATION_POLICY)
 #include "components/policy/core/common/cloud/policy_header_io_helper.h"
 #endif
@@ -223,6 +226,7 @@ void LaunchURL(const GURL& url, int render_process_id, int render_view_id) {
 }
 #endif  // !defined(OS_ANDROID)
 
+#if !defined(DISABLE_NACL)
 void AppendComponentUpdaterThrottles(
     net::URLRequest* request,
     content::ResourceContext* resource_context,
@@ -251,8 +255,9 @@ void AppendComponentUpdaterThrottles(
         component_updater::GetOnDemandResourceThrottle(cus, crx_id));
   }
 }
+#endif
 
-}  // end namespace
+}  // namespace
 
 ChromeResourceDispatcherHostDelegate::ChromeResourceDispatcherHostDelegate(
     prerender::PrerenderTracker* prerender_tracker)
@@ -402,12 +407,14 @@ void ChromeResourceDispatcherHostDelegate::RequestBeginning(
                                   resource_context,
                                   resource_type,
                                   throttles);
+#if defined(ENABLE_PLUGINS)
   if (!is_prerendering) {
     AppendComponentUpdaterThrottles(request,
                                     resource_context,
                                     resource_type,
                                     throttles);
   }
+#endif
 }
 
 void ChromeResourceDispatcherHostDelegate::DownloadStarting(