Add new app banner metrics using InstallableStatusCode.

chrome/browser/banners/app_banner_metrics.h

Index: chrome/browser/banners/app_banner_metrics.h
diff --git a/chrome/browser/banners/app_banner_metrics.h b/chrome/browser/banners/app_banner_metrics.h
index 357911aa63bc8f201ef32e297caf51cb426fea2c..1ca8212631da3a7d4d196392c6d42130a12307ea 100644
--- a/chrome/browser/banners/app_banner_metrics.h
+++ b/chrome/browser/banners/app_banner_metrics.h
@@ -5,6 +5,8 @@
 #ifndef CHROME_BROWSER_BANNERS_APP_BANNER_METRICS_H_
 #define CHROME_BROWSER_BANNERS_APP_BANNER_METRICS_H_
 
+#include "chrome/browser/installable/installable_logging.h"
+
 namespace banners {
 
 // This enum backs a UMA histogram, so it should be treated as append-only.
@@ -78,6 +80,7 @@ extern const char kInstallEventHistogram[];
 extern const char kMinutesHistogram[];
 extern const char kUserResponseHistogram[];
 extern const char kBeforeInstallEventHistogram[];
+extern const char kInstallableStatusCodeHistogram[];
 
 void TrackDismissEvent(int event);
 void TrackDisplayEvent(int event);
@@ -85,6 +88,7 @@ void TrackInstallEvent(int event);
 void TrackMinutesFromFirstVisitToBannerShown(int minutes);
 void TrackUserResponse(int event);
 void TrackBeforeInstallEvent(int event);
+void TrackInstallableStatusCode(InstallableStatusCode code);
 
 };  // namespace banners