We have a problem in the process on destroying WebContentsImpl because

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 9431b79c2da70748c78abbcafe3c937021dc8448..504af77997c078f8e9cc5e0b111bd19c117ebebc 100644
--- a/chrome/browser/download/download_request_limiter.cc
+++ b/chrome/browser/download/download_request_limiter.cc
@@ -110,14 +110,12 @@ void DownloadRequestLimiter::TabDownloadState::DidGetUserGesture() {
   }
 }
 
-void DownloadRequestLimiter::TabDownloadState::WebContentsDestroyed(
-    content::WebContents* web_contents) {
+void DownloadRequestLimiter::TabDownloadState::WebContentsDestroyed() {
   // Tab closed, no need to handle closing the dialog as it's owned by the
   // WebContents.
 
   NotifyCallbacks(false);
-  // Note that web_contents() is NULL at this point.
-  host_->Remove(this, web_contents);
+  host_->Remove(this, web_contents());
   // WARNING: We've been deleted.
 }