MacViews: Implement Full Keyboard Access.

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 <map>
 #include <utility>
@@ skipping 127 matching lines @@
       row_height_(font_list_.GetHeight() + kTextVerticalPadding * 2),
       last_parent_width_(0),
       layout_width_(0),
       grouper_(NULL),
       in_set_visible_column_width_(false) {
   for (size_t i = 0; i < columns.size(); ++i) {
     VisibleColumn visible_column;
     visible_column.column = columns[i];
     visible_columns_.push_back(visible_column);
   }
+  // On Mac, except textfields and lists, no control should be focusable by
+  // default. In Cocoa, lists are generally represented using NSTableView. Hence
+  // use ALWAYS focus behavior for TableView.

[tapted, 2016/04/20 06:05:58]

This comment feels out of place. I think it's enough to say

// Always focusable, even on Mac (consistent with NSTableView).

[karandeepb, 2016/05/03 02:54:12]

Done.

   SetFocusBehavior(FocusBehavior::ALWAYS);
   SetModel(model);
 }
 
 TableView::~TableView() {
   if (model_)
     model_->SetObserver(NULL);
 }
 
 // TODO: this doesn't support arbitrarily changing the model, rename this to
@@ skipping 790 matching lines @@
   if (tooltip)
     *tooltip = text;
   if (tooltip_origin) {
     tooltip_origin->SetPoint(cell_bounds.x(),
                              cell_bounds.y() + kTextVerticalPadding);
   }
   return true;
 }
 
 }  // namespace views