Fix the crash of issue 2209773002

third_party/WebKit/Source/core/layout/LayoutTheme.cpp

Index: third_party/WebKit/Source/core/layout/LayoutTheme.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTheme.cpp b/third_party/WebKit/Source/core/layout/LayoutTheme.cpp
index 71d3be274d7037a8aa597f5e5f08199b37fc1d2f..f5df6d8e6fa1458f4d7172e3fa7060128bfc3366 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTheme.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTheme.cpp
@@ -635,7 +635,7 @@ void LayoutTheme::adjustMenuListButtonStyle(ComputedStyle&, Element*) const
 
 void LayoutTheme::adjustSliderContainerStyle(ComputedStyle& style, Element* e) const
 {
-    if (e->shadowPseudoId() == "-webkit-media-slider-container" || e->shadowPseudoId() == "-webkit-slider-container") {
+    if (e && (e->shadowPseudoId() == "-webkit-media-slider-container" || e->shadowPseudoId() == "-webkit-slider-container")) {
         if (style.appearance() == SliderVerticalPart) {
             style.setTouchAction(TouchActionPanX);
             style.setAppearance(NoControlPart);