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

chrome/browser/ui/views/importer/import_lock_dialog_view.cc

Index: chrome/browser/ui/views/importer/import_lock_dialog_view.cc
diff --git a/chrome/browser/ui/views/importer/import_lock_dialog_view.cc b/chrome/browser/ui/views/importer/import_lock_dialog_view.cc
index 061fceb48ea3a6ac4271d93e229ccfcf97703c79..129d8e56dd93be555bb939bb45b04626a09f77b3 100644
--- a/chrome/browser/ui/views/importer/import_lock_dialog_view.cc
+++ b/chrome/browser/ui/views/importer/import_lock_dialog_view.cc
@@ -30,13 +30,28 @@ void ShowImportLockDialog(gfx::NativeWindow parent,
   content::RecordAction(UserMetricsAction("ImportLockDialogView_Shown"));
 }
 
+void HideImportLockDialog() {
+  ImportLockDialogView::Hide();
+}
+
 }  // namespace importer
 
+// For storing widget ptr on creation of dialog widget
+// using method CreateDialogWidget.

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

nit: I'd simplify this comment to "The currently open dialog widget, or null if
no dialog is currently open."

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

Done.

+static views::Widget* g_widget = nullptr;

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

nit: Please move this to an anonymous namespace.

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

Done.

+
+// static
+void ImportLockDialogView::Hide() {
+  if (g_widget)
+    g_widget->CloseNow();

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

I'm pretty sure, based on reading the documentation, that you should call
Close() rather than CloseNow().  Do you have a reason for calling CloseNow()
instead?

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

Done.

+}
+
 // static
 void ImportLockDialogView::Show(gfx::NativeWindow parent,
                                 const base::Callback<void(bool)>& callback) {
-  views::DialogDelegate::CreateDialogWidget(
-      new ImportLockDialogView(callback), NULL, NULL)->Show();
+  g_widget = views::DialogDelegate::CreateDialogWidget(
+      new ImportLockDialogView(callback), NULL, NULL);
+  g_widget->Show();
 }
 
 ImportLockDialogView::ImportLockDialogView(