NOT YET READY: UMA recording the kind of target frame when extensions pierce browsing instance.

chrome/browser/extensions/installed_loader.cc

Index: chrome/browser/extensions/installed_loader.cc
diff --git a/chrome/browser/extensions/installed_loader.cc b/chrome/browser/extensions/installed_loader.cc
index 87879a36a3da3862074390b5d423fa4f3f413857..e05915e37cc9e53791867002bf89a53eac5faa48 100644
--- a/chrome/browser/extensions/installed_loader.cc
+++ b/chrome/browser/extensions/installed_loader.cc
@@ -456,8 +456,7 @@ void InstalledLoader::RecordExtensionsMetrics() {
     // Using an enumeration shows us the total installed ratio across all users.
     // Using the totals per user at each startup tells us the distribution of
     // usage for each user (e.g. 40% of users have at least one app installed).
-    UMA_HISTOGRAM_ENUMERATION(
-        "Extensions.LoadType", type, Manifest::NUM_LOAD_TYPES);
+    UMA_HISTOGRAM_ENUMERATION("Extensions.LoadType", type, Manifest::TYPE_MAX);
     switch (type) {
       case Manifest::TYPE_THEME:
         ++theme_count;