Make module enumeration a low priority background task.

chrome/browser/ui/webui/conflicts_ui.cc

Index: chrome/browser/ui/webui/conflicts_ui.cc
diff --git a/chrome/browser/ui/webui/conflicts_ui.cc b/chrome/browser/ui/webui/conflicts_ui.cc
index d39f36787e8f7b3fbaf2402eb9633c9de31c4fcf..7a38864b5ed3ac1a3e4bd6095c4e5c967cb316fe 100644
--- a/chrome/browser/ui/webui/conflicts_ui.cc
+++ b/chrome/browser/ui/webui/conflicts_ui.cc
@@ -122,7 +122,10 @@ void ConflictsDOMHandler::HandleRequestModuleList(const base::ListValue* args) {
   // easy enough to defend against this.
   if (!observer_.IsObserving(model)) {
     observer_.Add(model);
-    model->ScanNow();
+
+    // Ask the scan to be performed immediately, and not in background mode.
+    // This ensures the results are available ASAP for the UI.
+    model->ScanNow(false);
   }
 }