Introduce BubbleDialogDelegateView, which extends DialogDelegateView

chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc

Index: chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
diff --git a/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc b/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
index e1f951f8543d049e66a5e2b59ff8ddf0995c7487..473980f7ab9ddee3450d4e765a85ef9e8899a3d5 100644
--- a/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
+++ b/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
@@ -213,7 +213,7 @@ views::View* CardUnmaskPromptViews::GetContentsView() {
   return this;
 }
 
-views::View* CardUnmaskPromptViews::CreateFootnoteView() {
+scoped_ptr<views::View> CardUnmaskPromptViews::CreateFootnoteView() {
   if (!controller_->CanStoreLocally())
     return nullptr;
 
@@ -236,7 +236,7 @@ views::View* CardUnmaskPromptViews::CreateFootnoteView() {
   storage_row_->AddChildView(new TooltipIcon(l10n_util::GetStringUTF16(
       IDS_AUTOFILL_CARD_UNMASK_PROMPT_STORAGE_TOOLTIP)));
 
-  return storage_row_;
+  return scoped_ptr<views::View>(storage_row_);
 }
 
 gfx::Size CardUnmaskPromptViews::GetPreferredSize() const {
@@ -288,10 +288,6 @@ void CardUnmaskPromptViews::DeleteDelegate() {
   delete this;
 }
 
-int CardUnmaskPromptViews::GetDialogButtons() const {
-  return ui::DIALOG_BUTTON_OK | ui::DIALOG_BUTTON_CANCEL;
-}
-
 base::string16 CardUnmaskPromptViews::GetDialogButtonLabel(
     ui::DialogButton button) const {
   if (button == ui::DIALOG_BUTTON_OK)