Optimize promotion of ephemeral apps

extensions/browser/extension_registry.h

Index: extensions/browser/extension_registry.h
diff --git a/extensions/browser/extension_registry.h b/extensions/browser/extension_registry.h
index 0087645d08949fb3e071572a40aa4a5b44a7c5fd..646863c224623475d3b242333fe033699ad582bd 100644
--- a/extensions/browser/extension_registry.h
+++ b/extensions/browser/extension_registry.h
@@ -78,8 +78,12 @@ class ExtensionRegistry : public KeyedService {
   // any installed extension with |extension|'s ID. If this is an update then
   // |is_update| is true and must be an installed extension with |extension|'s
   // ID, and |old_name| must be non-empty.
+  // If true, |from_ephemeral| indicates that the extension was previously
+  // installed ephemerally and has been promoted to a regular installed
+  // extension. |is_update| should also be true.
   void TriggerOnWillBeInstalled(const Extension* extension,
                                 bool is_update,
+                                bool from_ephemeral,
                                 const std::string& old_name);
 
   // Invokes the observer method OnExtensionUninstalled(). The extension must