Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/modules/accessibility/AXNodeObject.h

Index: third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
diff --git a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
index 327773d2f100929c86291944f348d402dedd79b4..80759028f2ce5ec93b9a2cefb84bec0db9786bf6 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
+++ b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
@@ -55,8 +55,8 @@ class MODULES_EXPORT AXNodeObject : public AXObject {
   // Protected data.
   AccessibilityRole m_ariaRole;
   bool m_childrenDirty;
-#if ENABLE(ASSERT)
-  bool m_initialized;
+#if DCHECK_IS_ON()
+  bool m_initialized = false;
 #endif
 
   bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;