Firefox overlay is seen opened even if Import Overlay is Cancelled.

chrome/browser/importer/importer_lock_dialog.h

Index: chrome/browser/importer/importer_lock_dialog.h
diff --git a/chrome/browser/importer/importer_lock_dialog.h b/chrome/browser/importer/importer_lock_dialog.h
index 53b44273133ee7800cba44a78cb8754320178121..2327528716cf5e85a551699804342285beaa52e0 100644
--- a/chrome/browser/importer/importer_lock_dialog.h
+++ b/chrome/browser/importer/importer_lock_dialog.h
@@ -16,6 +16,10 @@ namespace importer {
 void ShowImportLockDialog(gfx::NativeWindow parent,
                           const base::Callback<void(bool)>& callback);
 
+// This function is called by an ImporterHost, to close the Firefox profile
+// warning dialog opened by using ShowImportLockDialog function

[Ilya Sherman, 2017/03/29 06:29:02]

nit: "This function is called by an ImporterHost, and closes the Firefox profile
warning dialog."

[nikhil.sahni, 2017/03/30 12:13:35]

Done.

+void HideImportLockDialog();
+
 }  // namespace importer
 
 #endif  // CHROME_BROWSER_IMPORTER_IMPORTER_LOCK_DIALOG_H_