Move download stuff to download tab helper.

chrome/browser/download/download_request_limiter.cc

Index: chrome/browser/download/download_request_limiter.cc
diff --git a/chrome/browser/download/download_request_limiter.cc b/chrome/browser/download/download_request_limiter.cc
index 579c172c490d53ab5ac4f69b881b4964f6d28af1..b39e1f630ca7ee6f4ebd9279ee090de9e2b837f6 100644
--- a/chrome/browser/download/download_request_limiter.cc
+++ b/chrome/browser/download/download_request_limiter.cc
@@ -12,6 +12,8 @@
 #include "content/browser/tab_contents/navigation_entry.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/browser/tab_contents/tab_contents_delegate.h"
+#include "chrome/browser/ui/download/download_tab_helper.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "content/common/notification_source.h"
 
 // TabDownloadState ------------------------------------------------------------
@@ -256,7 +258,9 @@ void DownloadRequestLimiter::CanDownloadImpl(
   // FYI: Chrome Frame overrides CanDownload in ExternalTabContainer in order
   // to cancel the download operation in chrome and let the host browser
   // take care of it.
-  if (!originating_tab->CanDownload(request_id)) {
+  TabContentsWrapper* wrapper =
+      TabContentsWrapper::GetCurrentWrapperForContents(originating_tab);
+  if (!wrapper->download_tab_helper()->CanDownload(request_id)) {
     ScheduleNotification(callback, false);
     return;
   }