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..0aba40bfdd4d7d4d5c140b712d3f866094f51df1 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
@@ -24,12 +25,13 @@
 class WebShareTargetPickerView : public views::DialogDelegateView,
                                  public ui::TableModel {
  public:
-  // |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.
+  // |targets| is a list of app titles that will be shown in a list. If the user
+  // picks a target, this calls |callback| with the manifest URL of the chosen
+  // target, and returns null if the user cancelled the share.

[Matt Giuca, 2017/02/01 07:04:33]

s/and/or

[constantina, 2017/02/01 23:24:21]

Done.

   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:
@@ -43,6 +45,7 @@ class WebShareTargetPickerView : public views::DialogDelegateView,
   bool Cancel() override;
   bool Accept() override;
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
+  bool IsDialogButtonEnabled(ui::DialogButton button) const override;
 
   // ui::TableModel overrides:
   int RowCount() override;
@@ -50,9 +53,11 @@ 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);
 };