Add method for identifying different InfoBars

chrome/browser/plugins/plugin_observer.cc

Index: chrome/browser/plugins/plugin_observer.cc
diff --git a/chrome/browser/plugins/plugin_observer.cc b/chrome/browser/plugins/plugin_observer.cc
index 7210af3313aea52bc09e0eab2249ce6153ad49c6..7ef1fa5451427fe1a31585e474cc7968a99cdbe6 100644
--- a/chrome/browser/plugins/plugin_observer.cc
+++ b/chrome/browser/plugins/plugin_observer.cc
@@ -136,6 +136,7 @@ class ReloadPluginInfoBarDelegate : public ConfirmInfoBarDelegate {
   ~ReloadPluginInfoBarDelegate() override;
 
   // ConfirmInfobarDelegate:
+  std::string GetIdentifier() const override;
   int GetIconId() const override;
   gfx::VectorIconId GetVectorIconId() const override;
   base::string16 GetMessageText() const override;
@@ -165,6 +166,10 @@ ReloadPluginInfoBarDelegate::ReloadPluginInfoBarDelegate(
 
 ReloadPluginInfoBarDelegate::~ReloadPluginInfoBarDelegate(){ }
 
+std::string ReloadPluginInfoBarDelegate::GetIdentifier() const {
+  return "ReloadPluginInfoBarDelegate";
+}
+
 int ReloadPluginInfoBarDelegate::GetIconId() const {
   return IDR_INFOBAR_PLUGIN_CRASHED;
 }
@@ -416,6 +421,7 @@ void PluginObserver::OnCouldNotLoadPlugin(const base::FilePath& plugin_path) {
       PluginService::GetInstance()->GetPluginDisplayNameByPath(plugin_path);
   SimpleAlertInfoBarDelegate::Create(
       InfoBarService::FromWebContents(web_contents()),
+      "PluginObserver",
       IDR_INFOBAR_PLUGIN_CRASHED,
 #if !defined(OS_MACOSX) && !defined(OS_IOS) && !defined(OS_ANDROID)
       gfx::VectorIconId::EXTENSION_CRASHED,