Change over IgnoreReturn to IgnoreResult. remove IgnoreReturn.

chrome/browser/external_tab_container_win.cc

Index: chrome/browser/external_tab_container_win.cc
diff --git a/chrome/browser/external_tab_container_win.cc b/chrome/browser/external_tab_container_win.cc
index b7d03115afc2352c4665f8968f82942f5d4a754b..0132b29a84000cebb3037d92780cddb4b8c60144 100644
--- a/chrome/browser/external_tab_container_win.cc
+++ b/chrome/browser/external_tab_container_win.cc
@@ -561,10 +561,11 @@ bool ExternalTabContainer::CanDownload(WebContents* source, int request_id) {
 
       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE,
-          base::IgnoreReturn<bool>(base::Bind(
-              &AutomationResourceMessageFilter::SendDownloadRequestToHost,
-              automation_resource_message_filter_.get(), 0, tab_handle_,
-              request_id)));
+          base::Bind(
+             base::IgnoreResult(
+                 &AutomationResourceMessageFilter::SendDownloadRequestToHost),
+             automation_resource_message_filter_.get(), 0, tab_handle_,
+             request_id));
     }
   } else {
     DLOG(WARNING) << "Downloads are only supported with host browser network "