Remove TabContents from TabModalConfirmDialog.

chrome/browser/download/download_danger_prompt.cc

Index: chrome/browser/download/download_danger_prompt.cc
diff --git a/chrome/browser/download/download_danger_prompt.cc b/chrome/browser/download/download_danger_prompt.cc
index 59f4b32024fd5f9954aa5fed83f3f3f081e265fc..22603c0dddbb044140800ff01f2ffb22414f3c62 100644
--- a/chrome/browser/download/download_danger_prompt.cc
+++ b/chrome/browser/download/download_danger_prompt.cc
@@ -151,6 +151,6 @@ DownloadDangerPrompt* DownloadDangerPrompt::Create(
   DownloadDangerPromptImpl* prompt =
       new DownloadDangerPromptImpl(item, tab_contents, accepted, canceled);
   // |prompt| will be deleted when the dialog is done.
-  TabModalConfirmDialog::Create(prompt, tab_contents);
+  TabModalConfirmDialog::Create(prompt, tab_contents->web_contents());
   return prompt;
 }