Move download stuff to download tab helper.

chrome/browser/download/download_process_handle.h

Index: chrome/browser/download/download_process_handle.h
diff --git a/chrome/browser/download/download_process_handle.h b/chrome/browser/download/download_process_handle.h
index b722d61be39cd7db82b35d7756242551ca8ed708..d5c9dc7efd9f3102760f974ea35c5885a856177f 100644
--- a/chrome/browser/download/download_process_handle.h
+++ b/chrome/browser/download/download_process_handle.h
@@ -9,6 +9,7 @@
 class DownloadManager;
 class ResourceDispatcherHost;
 class TabContents;
+class TabContentsWrapper;
 
 // A handle used by the download system for operations on external
 // objects associated with the download (e.g. URLRequest, TabContents,
@@ -22,6 +23,7 @@ class DownloadProcessHandle {
 
   // These functions must be called on the UI thread.
   TabContents* GetTabContents();
+  TabContentsWrapper* GetTabContentsWrapper();
   DownloadManager* GetDownloadManager();
 
   int child_id() const { return child_id_; }