Implement clipboard features in views textfield.

views/controls/textfield/native_textfield_views.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/textfield/native_textfield_views.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 427 matching lines @@
     bool control = key_event.IsControlDown();
     bool text_changed = false;
     bool cursor_changed = false;
     switch (key_code) {
       case app::VKEY_A:
         if (control) {
           model_->SelectAll();
           cursor_changed = true;
         }
         break;
+      case app::VKEY_X:
+        if (control)
+          text_changed = model_->Cut();
+        break;
+      case app::VKEY_C:
+        if (control)
+          model_->Copy();
+        break;
+      case app::VKEY_V:
+        if (control)
+          text_changed = model_->Paste();
+        break;
       case app::VKEY_RIGHT:
         control ? model_->MoveCursorToNextWord(selection)
             : model_->MoveCursorRight(selection);
         cursor_changed = true;
         break;
       case app::VKEY_LEFT:
         control ? model_->MoveCursorToPreviousWord(selection)
             : model_->MoveCursorLeft(selection);
         cursor_changed = true;
         break;
@@ skipping 284 matching lines @@
 }
 
 void NativeTextfieldViews::TextfieldBorder::SetInsets(int top,
                                                       int left,
                                                       int bottom,
                                                       int right) {
   insets_.Set(top, left, bottom, right);
 }
 
 }  // namespace views