[Web Payments] Add PopMany and Size functions to ViewStack

chrome/browser/ui/views/payments/payment_request_browsertest_base.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_BROWSERTEST_BASE_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_BROWSERTEST_BASE_H_
 
 #include <list>
 #include <memory>
 #include <string>
@@ skipping 67 matching lines @@
 
   // PaymentRequestDialogView::ObserverForTest:
   void OnDialogOpened() override;
   void OnOrderSummaryOpened() override;
   void OnPaymentMethodOpened() override;
   void OnShippingAddressSectionOpened() override;
   void OnShippingOptionSectionOpened() override;
   void OnCreditCardEditorOpened() override;
   void OnShippingAddressEditorOpened() override;
   void OnBackNavigation() override;
+  void OnBackToPaymentSheetNavigation() override;
   void OnContactInfoOpened() override;
   void OnEditorViewUpdated() override;
   void OnErrorMessageShown() override;
   void OnSpecDoneUpdating() override;
   void OnCvcPromptShown() override;
 
   // views::WidgetObserver
   // Effective way to be warned of all dialog closures.
   void OnWidgetDestroyed(views::Widget* widget) override;
 
@@ skipping 92 matching lines @@
   enum DialogEvent : int {
     DIALOG_OPENED,
     DIALOG_CLOSED,
     ORDER_SUMMARY_OPENED,
     PAYMENT_METHOD_OPENED,
     SHIPPING_ADDRESS_SECTION_OPENED,
     SHIPPING_OPTION_SECTION_OPENED,
     CREDIT_CARD_EDITOR_OPENED,
     SHIPPING_ADDRESS_EDITOR_OPENED,
     BACK_NAVIGATION,
+    BACK_TO_PAYMENT_SHEET_NAVIGATION,
     CONTACT_INFO_OPENED,
     EDITOR_VIEW_UPDATED,
     CAN_MAKE_PAYMENT_CALLED,
     ERROR_MESSAGE_SHOWN,
     SPEC_DONE_UPDATING,
     CVC_PROMPT_SHOWN,
   };
 
   // DialogEventObserver is used to wait on specific events that may have
   // occured before the call to Wait(), or after, in which case a RunLoop is
@@ skipping 40 matching lines @@
   // Weak, owned by the PaymentRequest object.
   TestChromePaymentRequestDelegate* delegate_;
   bool incognito_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestBrowserTestBase);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_BROWSERTEST_BASE_H_