Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/core/layout/line/LineBoxList.cpp

Index: third_party/WebKit/Source/core/layout/line/LineBoxList.cpp
diff --git a/third_party/WebKit/Source/core/layout/line/LineBoxList.cpp b/third_party/WebKit/Source/core/layout/line/LineBoxList.cpp
index 7938afb2dd6040150e4b243f33613013fa9d8203..77b3069d5110660677a1922f67850af17ce08149 100644
--- a/third_party/WebKit/Source/core/layout/line/LineBoxList.cpp
+++ b/third_party/WebKit/Source/core/layout/line/LineBoxList.cpp
@@ -40,7 +40,7 @@
 
 namespace blink {
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
 LineBoxList::~LineBoxList() {
   ASSERT(!m_firstLineBox);
   ASSERT(!m_lastLineBox);
@@ -364,7 +364,7 @@ void LineBoxList::dirtyLinesFromChangedChild(LineLayoutItem container,
   }
 }
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
 void LineBoxList::checkConsistency() const {
 #ifdef CHECK_CONSISTENCY
   const InlineFlowBox* prev = nullptr;