new implementation of default apps

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index d6b0d9656d1d7385d2b846bdede06a2bd146e0bb..f72a53f108cf19cd59315551d11825d5b141a9eb 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -2252,8 +2252,13 @@ bool ExtensionService::OnExternalExtensionFileFound(
          bool mark_acknowledged) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   CHECK(Extension::IdIsValid(id));
-  if (extension_prefs_->IsExternalExtensionUninstalled(id))
-    return false;
+
+  // The default apps use the external extensions installer but are installed
+  // as internal.
+  if (location != Extension::INTERNAL) {
+    if (extension_prefs_->IsExternalExtensionUninstalled(id))
+      return false;
+  }
 
   DCHECK(version);