Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/page/DragController.cpp

 /*
  * Copyright (C) 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 414 matching lines @@
 {
     frame->selection().setSelection(dragCaret);
     if (frame->selection().isNone()) {
         dragCaret = VisibleSelection(frame->positionForPoint(point));
         frame->selection().setSelection(dragCaret);
         range = createRange(dragCaret.toNormalizedEphemeralRange());
     }
     return !frame->selection().isNone() && frame->selection().isContentEditable();
 }
 
-bool DragController::dispatchTextInputEventFor(LocalFrame* innerFrame, DragData* dragData)
+DispatchEventResult DragController::dispatchTextInputEventFor(LocalFrame* innerFrame, DragData* dragData)
 {
     ASSERT(m_page->dragCaretController().hasCaret());
     String text = m_page->dragCaretController().isContentRichlyEditable() ? "" : dragData->asPlainText();
     Element* target = innerFrame->editor().findEventTargetFrom(VisibleSelection(m_page->dragCaretController().caretPosition()));
     return target->dispatchEvent(TextEvent::createForDrop(innerFrame->domWindow(), text));
 }
 
 bool DragController::concludeEditDrag(DragData* dragData)
 {
     ASSERT(dragData);
 
     RefPtrWillBeRawPtr<HTMLInputElement> fileInput = m_fileInputElementUnderMouse;
     if (m_fileInputElementUnderMouse) {
         m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);
         m_fileInputElementUnderMouse = nullptr;
     }
 
     if (!m_documentUnderMouse)
         return false;
 
     IntPoint point = m_documentUnderMouse->view()->rootFrameToContents(dragData->clientPosition());
     Element* element = elementUnderMouse(m_documentUnderMouse.get(), point);
     if (!element)
         return false;
     RefPtrWillBeRawPtr<LocalFrame> innerFrame = element->ownerDocument()->frame();
     ASSERT(innerFrame);
 
-    if (m_page->dragCaretController().hasCaret() && !dispatchTextInputEventFor(innerFrame.get(), dragData))
+    if (m_page->dragCaretController().hasCaret() && dispatchTextInputEventFor(innerFrame.get(), dragData) != DispatchEventResult::NotCanceled)
         return true;
 
     if (dragData->containsFiles() && fileInput) {
         // fileInput should be the element we hit tested for, unless it was made
         // display:none in a drop event handler.
         ASSERT(fileInput == element || !fileInput->layoutObject());
         if (fileInput->isDisabledFormControl())
             return false;
 
         return fileInput->receiveDroppedFiles(dragData);
@@ skipping 499 matching lines @@
 
 DEFINE_TRACE(DragController)
 {
     visitor->trace(m_page);
     visitor->trace(m_documentUnderMouse);
     visitor->trace(m_dragInitiator);
     visitor->trace(m_fileInputElementUnderMouse);
 }
 
 } // namespace blink