Remove InsecureContentInfobarDelegate, which has been broken for a while

chrome/browser/infobars/infobar_service.cc

Index: chrome/browser/infobars/infobar_service.cc
diff --git a/chrome/browser/infobars/infobar_service.cc b/chrome/browser/infobars/infobar_service.cc
index b8dadd2c42db58372bfbda0ed08b29d29fb8f23b..71b925185988c456a7f045fb05039605681a4e39 100644
--- a/chrome/browser/infobars/infobar_service.cc
+++ b/chrome/browser/infobars/infobar_service.cc
@@ -6,7 +6,6 @@
 
 #include "base/command_line.h"
 #include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/infobars/insecure_content_infobar_delegate.h"
 #include "chrome/common/render_messages.h"
 #include "components/content_settings/content/common/content_settings_messages.h"
 #include "components/infobars/core/infobar.h"
@@ -115,20 +114,6 @@ void InfoBarService::WebContentsDestroyed() {
   // returning from this function is the only safe thing to do.
 }
 
-bool InfoBarService::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(InfoBarService, message)
-    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_DidBlockDisplayingInsecureContent,
-                        OnDidBlockDisplayingInsecureContent)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void InfoBarService::OnDidBlockDisplayingInsecureContent() {
-  InsecureContentInfoBarDelegate::Create(this);
-}
-
 void InfoBarService::OpenURL(const GURL& url,
                              WindowOpenDisposition disposition) {
   // A normal user click on an infobar URL will result in a CURRENT_TAB