Remove import lock dialog black border.

ImportLockDialogView uses Widget::CreateWindow. 
Use DialogDelegate::CreateDialogWidget instead. 
See before/after pics at http://crbug.com/166075#c96
Trigger by making FF default, run chrome.exe --force-first-run

BUG=166075
TEST=Import lock dialog does not have a black border. 
R=sky@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15772008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202033 0039d316-1c4b-4281-b951-d872f2087c98

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

@@ -36,7 +36,8 @@ void ShowImportLockDialog(gfx::NativeWindow parent,
 // static
 void ImportLockDialogView::Show(gfx::NativeWindow parent,
                                 const base::Callback<void(bool)>& callback) {
-  views::Widget::CreateWindow(new ImportLockDialogView(callback))->Show();
+  views::DialogDelegate::CreateDialogWidget(
+      new ImportLockDialogView(callback), NULL, NULL)->Show();
 }
 
 ImportLockDialogView::ImportLockDialogView(