Fix use-after-free bug in long press selection

Source/core/input/EventHandler.cpp

Index: Source/core/input/EventHandler.cpp
diff --git a/Source/core/input/EventHandler.cpp b/Source/core/input/EventHandler.cpp
index 006aa2c40a9b7a45bfea777b122a31c3acd2a0e9..e869308b11cf8dc9dd93b3a1a5d3f02d57519328 100644
--- a/Source/core/input/EventHandler.cpp
+++ b/Source/core/input/EventHandler.cpp
@@ -2126,6 +2126,7 @@ bool EventHandler::handleGestureLongPress(const GestureEventWithHitTestResults&
 
     IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(gestureEvent.position());
     HitTestResult result = hitTestResultAtPoint(hitTestPoint);
+    RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());
     if (selectionController().handleGestureLongPress(gestureEvent, result)) {
         focusDocumentView();
         return true;
@@ -2785,7 +2786,7 @@ bool EventHandler::sendContextMenuEventForKey(Element* overrideTargetElement)
     // The contextmenu event is a mouse event even when invoked using the keyboard.
     // This is required for web compatibility.
     PlatformEvent::Type eventType = PlatformEvent::MousePressed;
-    if (m_frame->settings()->showContextMenuOnMouseUp())
+    if (m_frame->settings() && m_frame->settings()->showContextMenuOnMouseUp())
         eventType = PlatformEvent::MouseReleased;
 
     PlatformMouseEvent mouseEvent(locationInRootFrame, globalPosition, RightButton, eventType, 1, false, false, false, false, PlatformMouseEvent::RealOrIndistinguishable, WTF::currentTime());
@@ -2808,7 +2809,7 @@ bool EventHandler::sendContextMenuEventForGesture(const GestureEventWithHitTestR
 
     PlatformEvent::Type eventType = PlatformEvent::MousePressed;
 
-    if (m_frame->settings()->showContextMenuOnMouseUp())
+    if (m_frame->settings() && m_frame->settings()->showContextMenuOnMouseUp())
         eventType = PlatformEvent::MouseReleased;
     else
         modifiers |= PlatformEvent::RightButtonDown;