[InputEvent] Support 'insertTranspose'

third_party/WebKit/Source/core/events/InputEvent.h

 // Copyright 2016 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.
 
 #ifndef InputEvent_h
 #define InputEvent_h
 
 #include "core/clipboard/DataTransfer.h"
 #include "core/dom/Range.h"
 #include "core/dom/StaticRange.h"
@@ skipping 17 matching lines @@
     // Insertion.
     InsertText,
     InsertLineBreak,
     InsertParagraph,
     InsertOrderedList,
     InsertUnorderedList,
     InsertHorizontalRule,
     InsertFromPaste,
     InsertFromDrop,
     InsertFromYank,
+    InsertTranspose,
     InsertReplacementText,
     InsertCompositionText,
     // Deletion.
     DeleteWordBackward,
     DeleteWordForward,
     DeleteLineBackward,
     DeleteLineForward,
     DeleteContentBackward,
     DeleteContentForward,
     DeleteByCut,
@@ skipping 81 matching lines @@
   explicit InputEventDispatchMediator(InputEvent*);
   InputEvent& event() const;
   DispatchEventResult dispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(InputEvent);
 
 }  // namespace blink
 
 #endif  // InputEvent_h