Add method for identifying different InfoBars

chrome/browser/gpu/three_d_api_observer.cc

Index: chrome/browser/gpu/three_d_api_observer.cc
diff --git a/chrome/browser/gpu/three_d_api_observer.cc b/chrome/browser/gpu/three_d_api_observer.cc
index 3d3429558a61aaf738eae6846bb39210dfb7eda5..2fa880384801614e2e21fe56a64000a1e59d6064 100644
--- a/chrome/browser/gpu/three_d_api_observer.cc
+++ b/chrome/browser/gpu/three_d_api_observer.cc
@@ -39,6 +39,7 @@ class ThreeDAPIInfoBarDelegate : public ConfirmInfoBarDelegate {
   ~ThreeDAPIInfoBarDelegate() override;
 
   // ConfirmInfoBarDelegate:
+  infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   int GetIconId() const override;
   bool EqualsDelegate(infobars::InfoBarDelegate* delegate) const override;
   ThreeDAPIInfoBarDelegate* AsThreeDAPIInfoBarDelegate() override;
@@ -87,6 +88,11 @@ ThreeDAPIInfoBarDelegate::~ThreeDAPIInfoBarDelegate() {
   }
 }
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+ThreeDAPIInfoBarDelegate::GetIdentifier() const {
+  return THREE_D_API_INFOBAR_DELEGATE;
+}
+
 int ThreeDAPIInfoBarDelegate::GetIconId() const {
   return IDR_INFOBAR_3D_BLOCKED;
 }