Picker takes a vector of pairs, and passes back the user chosen target.

chrome/browser/ui/views/webshare/webshare_target_picker_view.h

Index: chrome/browser/ui/views/webshare/webshare_target_picker_view.h
diff --git a/chrome/browser/ui/views/webshare/webshare_target_picker_view.h b/chrome/browser/ui/views/webshare/webshare_target_picker_view.h
index 324955ebf5d36df8916559983b0abb052a5de22e..a4dcc7fde19de4d86ec316946f7e59cbd14cb829 100644
--- a/chrome/browser/ui/views/webshare/webshare_target_picker_view.h
+++ b/chrome/browser/ui/views/webshare/webshare_target_picker_view.h
@@ -13,6 +13,7 @@
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "ui/base/models/table_model.h"
 #include "ui/base/ui_base_types.h"
+#include "ui/views/controls/table/table_view.h"
 #include "ui/views/window/dialog_delegate.h"
 
 // Dialog that presents the user with a list of share target apps. Allows the
@@ -27,9 +28,10 @@ class WebShareTargetPickerView : public views::DialogDelegateView,
   // |targets| is a list of app titles that will be shown in a list. Calls
   // |close_callback| with SHARE if an app was chosen, or CANCEL if the dialog
   // was cancelled.
-  WebShareTargetPickerView(
+  explicit WebShareTargetPickerView(
       const std::vector<base::string16>& targets,
-      const base::Callback<void(SharePickerResult)>& close_callback);
+      const base::Callback<void(base::Optional<base::string16>)>&
+          close_callback);
   ~WebShareTargetPickerView() override;
 
   // views::View overrides:
@@ -50,9 +52,11 @@ class WebShareTargetPickerView : public views::DialogDelegateView,
   void SetObserver(ui::TableModelObserver* observer) override;
 
  private:
+  views::TableView* table_;
+
   const std::vector<base::string16> targets_;
 
-  base::Callback<void(SharePickerResult)> close_callback_;
+  base::Callback<void(base::Optional<base::string16>)> close_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(WebShareTargetPickerView);
 };