views: Implement NativeTableGtk::GetColumnWidth method.

views/controls/table/native_table_gtk.cc

 // Copyright (c) 2010 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 "views/controls/table/native_table_gtk.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
@@ skipping 56 matching lines @@
 
 void NativeTableGtk::InsertColumn(const TableColumn& column, int index) {
   NOTIMPLEMENTED();
 }
 
 void NativeTableGtk::RemoveColumn(int index) {
   NOTIMPLEMENTED();
 }
 
 int NativeTableGtk::GetColumnWidth(int column_index) const {
-  NOTIMPLEMENTED();
-  return -1;
+  GtkTreeViewColumn* column = gtk_tree_view_get_column(tree_view_,
+                                                       column_index);
+  return gtk_tree_view_column_get_width(column);
 }
 
 void NativeTableGtk::SetColumnWidth(int column_index, int width) {
   NOTIMPLEMENTED();
 }
 
 int NativeTableGtk::GetSelectedRowCount() const {
   return gtk_tree_selection_count_selected_rows(tree_selection_);
 }
 
@@ skipping 255 matching lines @@
   SkBitmap icon = table_->model()->GetIcon(row);
   return gfx::GdkPixbufFromSkBitmap(&icon);
 }
 
 // static
 NativeTableWrapper* NativeTableWrapper::CreateNativeWrapper(TableView2* table) {
   return new NativeTableGtk(table);
 }
 
 }  // namespace views