Implement new task manager mocks on windows.

views/controls/table/group_table_view.h

Index: views/controls/table/group_table_view.h
diff --git a/views/controls/table/group_table_view.h b/views/controls/table/group_table_view.h
index d4853cb24330d3090a7c72fe86238677b48cf819..adf0bac7ed0f076038f1878b412e670855356147 100644
--- a/views/controls/table/group_table_view.h
+++ b/views/controls/table/group_table_view.h
@@ -37,7 +37,8 @@ class GroupTableView : public TableView {
   GroupTableView(GroupTableModel* model,
                  const std::vector<TableColumn>& columns,
                  TableTypes table_type, bool single_selection,
-                 bool resizable_columns, bool autosize_columns);
+                 bool resizable_columns, bool autosize_columns,
+                 bool draw_group_separators);
   virtual ~GroupTableView();
 
   virtual std::string GetClassName() const;
@@ -70,6 +71,9 @@ class GroupTableView : public TableView {
 
   GroupTableModel* model_;
 
+  // If true, draw separators between groups.
+  bool draw_group_separators_;
+
   // A factory to make the selection consistent among groups.
   ScopedRunnableMethodFactory<GroupTableView> sync_selection_factory_;