Make ui::TextInputClient::IsEditCommandEnabled const.

ui/views/controls/textfield/textfield.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/textfield/textfield.h"
 
 #include <string>
 #include <utility>
 
 #include "base/trace_event/trace_event.h"
@@ skipping 1623 matching lines @@
 
   range.set_start(range.start() - before);
   range.set_end(range.end() + after);
   gfx::Range text_range;
   if (GetTextRange(&text_range) && text_range.Contains(range))
     DeleteRange(range);
 }
 
 void Textfield::EnsureCaretInRect(const gfx::Rect& rect) {}
 
-bool Textfield::IsEditCommandEnabled(int command_id) {
+bool Textfield::IsEditCommandEnabled(int command_id) const {
   return IsCommandIdEnabled(command_id);
 }
 
 void Textfield::SetEditCommandForNextKeyEvent(int command_id) {
   DCHECK_EQ(kNoCommand, scheduled_edit_command_);
   scheduled_edit_command_ = command_id;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Textfield, protected:
@@ skipping 274 matching lines @@
     RequestFocus();
   model_->MoveCursorTo(mouse);
   if (!selection_clipboard_text.empty()) {
     model_->InsertText(selection_clipboard_text);
     UpdateAfterChange(true, true);
   }
   OnAfterUserAction();
 }
 
 }  // namespace views