views::Textfield: Implement yank editing command.

ui/views/cocoa/bridged_content_view.mm

 // Copyright 2014 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.
 
 #import "ui/views/cocoa/bridged_content_view.h"
 
 #include "base/logging.h"
 #import "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 1011 matching lines @@
 }
 
 - (void)deleteToBeginningOfParagraph:(id)sender {
   [self deleteToBeginningOfLine:sender];
 }
 
 - (void)deleteToEndOfParagraph:(id)sender {
   [self deleteToEndOfLine:sender];
 }
 
+- (void)yank:(id)sender {
+  [self handleAction:ui::TextEditCommand::YANK
+             keyCode:ui::VKEY_Y
+             domCode:ui::DomCode::US_Y
+          eventFlags:ui::EF_CONTROL_DOWN];
+}
+
 // Cancellation.
 
 - (void)cancelOperation:(id)sender {
   [self handleAction:ui::TextEditCommand::INVALID_COMMAND
              keyCode:ui::VKEY_ESCAPE
              domCode:ui::DomCode::ESCAPE
           eventFlags:0];
 }
 
 // Support for Services in context menus.
@@ skipping 204 matching lines @@
   }
 
   return [super accessibilityAttributeValue:attribute];
 }
 
 - (id)accessibilityHitTest:(NSPoint)point {
   return [hostedView_->GetNativeViewAccessible() accessibilityHitTest:point];
 }
 
 @end