Add method for identifying different InfoBars

chrome/browser/android/hung_renderer_infobar_delegate.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/android/hung_renderer_infobar_delegate.h"
 
 #include "base/callback.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/android/android_theme_resources.h"
 #include "chrome/browser/infobars/infobar_service.h"
@@ skipping 20 matching lines @@
 HungRendererInfoBarDelegate::HungRendererInfoBarDelegate(
     content::RenderProcessHost* render_process_host)
     : render_process_host_(render_process_host),
       terminal_event_logged_for_uma_(false) {}
 
 HungRendererInfoBarDelegate::~HungRendererInfoBarDelegate() {
   if (!terminal_event_logged_for_uma_)
     LogEvent(TAB_CLOSED);
 }
 
+std::string HungRendererInfoBarDelegate::GetIdentifier() const {
+  return "HungRendererInfoBarDelegate";
+}
+
 void HungRendererInfoBarDelegate::InfoBarDismissed() {
   LogEvent(CLOSE_CLICKED);
 }
 
 HungRendererInfoBarDelegate*
 HungRendererInfoBarDelegate::AsHungRendererInfoBarDelegate() {
   return this;
 }
 
 int HungRendererInfoBarDelegate::GetIconId() const {
@@ skipping 21 matching lines @@
   LogEvent(WAIT_CLICKED);
   return true;
 }
 
 void HungRendererInfoBarDelegate::LogEvent(Event event) {
   DCHECK(!terminal_event_logged_for_uma_);
   terminal_event_logged_for_uma_ = true;
   UMA_HISTOGRAM_ENUMERATION("Renderer.Hung.MobileInfoBar.UserEvent", event,
                             EVENT_COUNT);
 }