Convert the WebRtcTestBase to use infobar and bubble autoresponders

chrome/browser/infobars/infobar_responder.h

Index: chrome/browser/infobars/infobar_responder.h
diff --git a/chrome/browser/infobars/infobar_responder.h b/chrome/browser/infobars/infobar_responder.h
index 266a2be9bcf6130cd6407186e5305643124ee16f..2e68a06af8bccc55f7ff88c2b9c0f9c46bf8e2e0 100644
--- a/chrome/browser/infobars/infobar_responder.h
+++ b/chrome/browser/infobars/infobar_responder.h
@@ -22,19 +22,26 @@ class InfoBarService;
 // The asynchronous response matches how real users will use the infobar.
 class InfoBarResponder : public infobars::InfoBarManager::Observer {
  public:
-  // If |should_accept| is true, the responder will asynchronously Accept() the
-  // infobar; otherwise it will Cancel() it.
-  InfoBarResponder(InfoBarService* infobar_service, bool should_accept);
+  enum AutoResponseType {
+    ACCEPT,
+    DENY,
+    DISMISS
+  };
+
+  // The responder will asynchronously perform the requested |response|.
+  InfoBarResponder(InfoBarService* infobar_service, AutoResponseType response);
   ~InfoBarResponder() override;
 
   // infobars::InfoBarManager::Observer:
   void OnInfoBarAdded(infobars::InfoBar* infobar) override;
+  void OnInfoBarReplaced(infobars::InfoBar* old_infobar,
+                         infobars::InfoBar* new_infobar) override;
 
  private:
   void Respond(ConfirmInfoBarDelegate* delegate);
 
   InfoBarService* infobar_service_;
-  bool should_accept_;
+  AutoResponseType response_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarResponder);
 };