Optimize promotion of ephemeral apps

extensions/browser/extension_prefs.cc

Index: extensions/browser/extension_prefs.cc
diff --git a/extensions/browser/extension_prefs.cc b/extensions/browser/extension_prefs.cc
index 3bbe6b2492bbde73b34ac4d0faaa4fcc8d5b0439..4d5b6c03ba0963634dcf428562cf10606f2f59a4 100644
--- a/extensions/browser/extension_prefs.cc
+++ b/extensions/browser/extension_prefs.cc
@@ -1640,6 +1640,10 @@ void ExtensionPrefs::RemoveEvictedEphemeralApp(
 }
 
 bool ExtensionPrefs::IsEphemeralApp(const std::string& extension_id) const {
+  // Hide the data of evicted ephemeral apps.
+  if (ReadPrefAsBooleanAndReturn(extension_id, kPrefEvictedEphemeralApp))
+    return false;
+
   if (ReadPrefAsBooleanAndReturn(extension_id, kPrefEphemeralApp))
     return true;
 
@@ -1648,6 +1652,16 @@ bool ExtensionPrefs::IsEphemeralApp(const std::string& extension_id) const {
   return (GetCreationFlags(extension_id) & Extension::IS_EPHEMERAL) != 0;
 }
 
+void ExtensionPrefs::OnEphemeralAppInstalled(const std::string& extension_id) {
+  DCHECK(IsEphemeralApp(extension_id));
+
+  ScopedExtensionPrefUpdate update(prefs_, extension_id);
+  update->Set(kPrefEphemeralApp, new base::FundamentalValue(false));
+
+  DCHECK(!IsEvictedEphemeralApp(update.Get()));
+  update->Remove(kPrefEvictedEphemeralApp, NULL);
+}
+
 bool ExtensionPrefs::WasAppDraggedByUser(const std::string& extension_id) {
   return ReadPrefAsBooleanAndReturn(extension_id, kPrefUserDraggedApp);
 }
@@ -2142,10 +2156,8 @@ void ExtensionPrefs::PopulateExtensionInfoPrefs(
   if (blacklisted_for_malware)
     extension_dict->Set(kPrefBlacklist, new base::FundamentalValue(true));
 
-  if (is_ephemeral)
-    extension_dict->Set(kPrefEphemeralApp, new base::FundamentalValue(true));
-  else
-    extension_dict->Remove(kPrefEphemeralApp, NULL);
+  extension_dict->Set(kPrefEphemeralApp,
+                      new base::FundamentalValue(is_ephemeral));
 
   base::FilePath::StringType path = MakePathRelative(install_directory_,
                                                      extension->path());