Optimize promotion of ephemeral apps

extensions/browser/extension_registry_observer.h

Index: extensions/browser/extension_registry_observer.h
diff --git a/extensions/browser/extension_registry_observer.h b/extensions/browser/extension_registry_observer.h
index b6cf8e0907fe34843a5fc5504d4e2d55bb290a09..0ae45c2ad818632cd0b823de3342a580533a56d3 100644
--- a/extensions/browser/extension_registry_observer.h
+++ b/extensions/browser/extension_registry_observer.h
@@ -37,6 +37,10 @@ class ExtensionRegistryObserver {
   // Called when |extension| is about to be installed. |is_update| is true if
   // the installation is the result of it updating, in which case |old_name| is
   // the name of the extension's previous version.
+  // If true, |from_ephemeral| indicates that the extension was previously
+  // installed ephemerally and has been promoted to a regular installed
+  // extension. |is_update| will be true, although the version has not
+  // necessarily changed.
   // The ExtensionRegistry will not be tracking |extension| at the time this
   // event is fired, but will be immediately afterwards (note: not necessarily
   // enabled; it might be installed in the disabled or even blacklisted sets,
@@ -47,6 +51,7 @@ class ExtensionRegistryObserver {
       content::BrowserContext* browser_context,
       const Extension* extension,
       bool is_update,
+      bool from_ephemeral,

[tmdiep, 2014/05/25 23:10:38]

This flags will be required by these patches (which depend on this one):
https://codereview.chromium.org/300623004
https://codereview.chromium.org/295163004

       const std::string& old_name) {}
 
   // Called after an extension is uninstalled. The extension no longer exsit in