Move download stuff to download tab helper.

chrome/browser/download/download_manager.cc

Index: chrome/browser/download/download_manager.cc
diff --git a/chrome/browser/download/download_manager.cc b/chrome/browser/download/download_manager.cc
index fb9fb7b033c3cd2c04eb3451e860e5844c69f5a7..a22eae4f2017500440b0cdf5a49fcf0bd2302e17 100644
--- a/chrome/browser/download/download_manager.cc
+++ b/chrome/browser/download/download_manager.cc
@@ -33,6 +33,8 @@
 #include "chrome/browser/tab_contents/tab_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/download/download_tab_helper.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/renderer_host/render_process_host.h"
@@ -1068,7 +1070,7 @@ void DownloadManager::ShowDownloadInBrowser(
   // The 'contents' may no longer exist if the user closed the tab before we
   // get this start completion event. If it does, tell the origin TabContents
   // to display its download shelf.
-  TabContents* contents = process_handle->GetTabContents();
+  TabContentsWrapper* contents = process_handle->GetTabContentsWrapper();
 
   // If the contents no longer exists, we start the download in the last active
   // browser. This is not ideal but better than fully hiding the download from
@@ -1076,13 +1078,13 @@ void DownloadManager::ShowDownloadInBrowser(
   if (!contents) {
     Browser* last_active = BrowserList::GetLastActive();
     if (last_active)
-      contents = last_active->GetSelectedTabContents();
+      contents = last_active->GetSelectedTabContentsWrapper();
   }
 
   if (!contents)
     return;
 
-  contents->OnStartDownload(download);
+  contents->download_tab_helper()->OnStartDownload(download);
 }
 
 // Clears the last download path, used to initialize "save as" dialogs.