[WebPayments] Implement state transitions in desktop WebPayments dialog.

chrome/browser/ui/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1772 matching lines @@
         "views/passwords/credentials_item_view.cc",
         "views/passwords/credentials_item_view.h",
         "views/passwords/credentials_selection_view.cc",
         "views/passwords/credentials_selection_view.h",
         "views/passwords/manage_password_items_view.cc",
         "views/passwords/manage_password_items_view.h",
         "views/passwords/manage_passwords_bubble_view.cc",
         "views/passwords/manage_passwords_bubble_view.h",
         "views/passwords/manage_passwords_icon_views.cc",
         "views/passwords/manage_passwords_icon_views.h",
+        "views/payments/order_summary_state.cc",
+        "views/payments/order_summary_state.h",
+        "views/payments/order_summary_state_observer.h",
         "views/payments/payment_request_dialog.cc",
         "views/payments/payment_request_dialog.h",
+        "views/payments/payment_sheet_state.cc",
+        "views/payments/payment_sheet_state.h",
+        "views/payments/payment_sheet_state_observer.h",
+        "views/payments/view_stack.cc",
+        "views/payments/view_stack.h",
+        "views/payments/view_stack_state.cc",
+        "views/payments/view_stack_state.h",
         "views/process_singleton_dialog_linux.cc",
         "views/profiles/profile_indicator_icon.cc",
         "views/profiles/profile_indicator_icon.h",
         "views/profiles/signin_view_controller_delegate_views.cc",
         "views/profiles/signin_view_controller_delegate_views.h",
         "views/profiles/user_manager_view.cc",
         "views/profiles/user_manager_view.h",
         "views/proximity_auth/proximity_auth_error_bubble_view.cc",
         "views/proximity_auth/proximity_auth_error_bubble_view.h",
         "views/session_crashed_bubble_view.cc",
@@ skipping 1679 matching lines @@
       "test/test_confirm_bubble_model.cc",
       "test/test_confirm_bubble_model.h",
     ]
     deps += [ "//chrome/test:test_support_ui" ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }