[Web Payments] Implement item selection in lists.

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

Index: chrome/browser/ui/views/payments/payment_request_item_list.h
diff --git a/chrome/browser/ui/views/payments/payment_request_item_list.h b/chrome/browser/ui/views/payments/payment_request_item_list.h
index 5ff845900f3169f2b31131fa6adab0bcb01c0c44..c89b69773c5b8575dadbac57525b6d2ca4d2b1bb 100644
--- a/chrome/browser/ui/views/payments/payment_request_item_list.h
+++ b/chrome/browser/ui/views/payments/payment_request_item_list.h
@@ -18,6 +18,7 @@ class View;
 
 namespace payments {
 
+class PaymentRequestDialogView;
 class PaymentRequestSpec;
 class PaymentRequestState;
 
@@ -102,7 +103,7 @@ class PaymentRequestItemList {
     DISALLOW_COPY_AND_ASSIGN(Item);
   };
 
-  PaymentRequestItemList();
+  explicit PaymentRequestItemList(PaymentRequestDialogView* dialog);
   virtual ~PaymentRequestItemList();
 
   // Adds an item to this list. |item->list()| should return this object.
@@ -113,8 +114,9 @@ class PaymentRequestItemList {
   // hierarchy.
   std::unique_ptr<views::View> CreateListView();
 
-  // Deselects the currently selected item and selects |item| instead.
-  void SelectItem(Item* item);
+  // Deselects the currently selected item and selects |item| instead. If
+  // |go_back| is true, also navigates the dialog back to the previous screen.
+  void SelectItem(Item* item, bool go_back);
 
  private:
   // Unselects the currently selected item. This is private so that the list can
@@ -124,6 +126,7 @@ class PaymentRequestItemList {
 
   std::vector<std::unique_ptr<Item>> items_;
   Item* selected_item_;
+  PaymentRequestDialogView* dialog_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestItemList);
 };