Make OutputDeveloperMessageCode an enum class

chrome/browser/banners/app_banner_manager.cc

Index: chrome/browser/banners/app_banner_manager.cc
diff --git a/chrome/browser/banners/app_banner_manager.cc b/chrome/browser/banners/app_banner_manager.cc
index 4e8aac325a4d7d6460252913e438260b6874969f..4f1eb09a05947b93c0a02cdd4eea912034f0f587 100644
--- a/chrome/browser/banners/app_banner_manager.cc
+++ b/chrome/browser/banners/app_banner_manager.cc
@@ -65,8 +65,8 @@ void AppBannerManager::RequestAppBanner(const GURL& validated_url,
                                         bool is_debug_mode) {
   content::WebContents* contents = web_contents();
   if (contents->GetMainFrame()->GetParent()) {
-    OutputDeveloperNotShownMessage(contents, kNotLoadedInMainFrame,
-                                   is_debug_mode);
+    OutputDeveloperNotShownMessage(contents,
+        OutputDeveloperMessageCode::kNotLoadedInMainFrame, is_debug_mode);
     return;
   }
 
@@ -80,8 +80,8 @@ void AppBannerManager::RequestAppBanner(const GURL& validated_url,
   // URL is invalid.
   if (!content::IsOriginSecure(validated_url) &&
       !gDisableSecureCheckForTesting) {
-    OutputDeveloperNotShownMessage(contents, kNotServedFromSecureOrigin,
-                                   is_debug_mode);
+    OutputDeveloperNotShownMessage(contents,
+        OutputDeveloperMessageCode::kNotServedFromSecureOrigin, is_debug_mode);
     return;
   }