Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/editing/SelectionEditor.cpp

Index: third_party/WebKit/Source/core/editing/SelectionEditor.cpp
diff --git a/third_party/WebKit/Source/core/editing/SelectionEditor.cpp b/third_party/WebKit/Source/core/editing/SelectionEditor.cpp
index 746562310b9739df6d37aa3efd23cc6c6f82c547..c6a7082261ca7675691ce7eca7eafcf70de3e1a7 100644
--- a/third_party/WebKit/Source/core/editing/SelectionEditor.cpp
+++ b/third_party/WebKit/Source/core/editing/SelectionEditor.cpp
@@ -633,7 +633,7 @@ bool SelectionEditor::modify(EAlteration alter, SelectionDirection direction, Te
         trialFrameSelection->setSelection(m_selection);
         trialFrameSelection->modify(alter, direction, granularity, NotUserTriggered);
 
-        if (trialFrameSelection->selection().isRange() && m_selection.isCaret() && !dispatchSelectStart())
+        if (trialFrameSelection->selection().isRange() && m_selection.isCaret() && dispatchSelectStart() != WebInputEventResult::NotHandled)
             return false;
     }
 
@@ -901,11 +901,11 @@ PassRefPtrWillBeRawPtr<Range> SelectionEditor::firstRange() const
     return firstRangeOf(m_selection);
 }
 
-bool SelectionEditor::dispatchSelectStart()
+WebInputEventResult SelectionEditor::dispatchSelectStart()
 {
     Node* selectStartTarget = m_selection.extent().computeContainerNode();
     if (!selectStartTarget)
-        return true;
+        return WebInputEventResult::NotHandled;
 
     return selectStartTarget->dispatchEvent(Event::createCancelableBubble(EventTypeNames::selectstart));
 }