Remove InfoBarDelegate::web_contents()

chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.cc

Index: chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.cc
diff --git a/chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.cc b/chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.cc
index 6160b6ef887115364a0b1f315a888ae8c43d206c..bd949e52c292c0c9d6658b7694ae6ab6de673730 100644
--- a/chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.cc
+++ b/chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.cc
@@ -115,10 +115,12 @@ bool RegisterProtocolHandlerInfoBarDelegate::LinkClicked(
     WindowOpenDisposition disposition) {
   content::RecordAction(
       base::UserMetricsAction("RegisterProtocolHandler.InfoBar_LearnMore"));
-  web_contents()->OpenURL(content::OpenURLParams(
-      GURL(chrome::kLearnMoreRegisterProtocolHandlerURL), content::Referrer(),
-      (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
-      content::PAGE_TRANSITION_LINK, false));
+  InfoBarService::WebContentsFromInfoBar(infobar())->OpenURL(
+      content::OpenURLParams(
+          GURL(chrome::kLearnMoreRegisterProtocolHandlerURL),
+          content::Referrer(),
+          (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
+          content::PAGE_TRANSITION_LINK, false));
   return false;
 }