Improve TableView unit tests and fix bugs that were uncovered.

ui/views/controls/table/table_view.cc

 // Copyright (c) 2012 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.
 
 #include "ui/views/controls/table/table_view.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 607 matching lines @@
         kGroupingIndicatorSize / 2, grouping_flags);
     i = last + 1;
   }
 }
 
 void TableView::OnFocus() {
   ScrollView* scroll_view = ScrollView::GetScrollViewForContents(this);
   if (scroll_view)
     scroll_view->SetHasFocusIndicator(true);
 
-  if (selection_model_.active() == -1 && RowCount())
-    SelectByViewIndex(0);
-
   SchedulePaintForSelection();
   NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
 }
 
 void TableView::OnBlur() {
   ScrollView* scroll_view = ScrollView::GetScrollViewForContents(this);
   if (scroll_view)
     scroll_view->SetHasFocusIndicator(false);
   SchedulePaintForSelection();
 }
@@ skipping 309 matching lines @@
   if (tooltip)
     *tooltip = text;
   if (tooltip_origin) {
     tooltip_origin->SetPoint(cell_bounds.x(),
                              cell_bounds.y() + kTextVerticalPadding);
   }
   return true;
 }
 
 }  // namespace views