Allow assertions to be enabled in Blink Release builds.

Source/core/rendering/RenderMultiColumnSet.cpp

Index: Source/core/rendering/RenderMultiColumnSet.cpp
diff --git a/Source/core/rendering/RenderMultiColumnSet.cpp b/Source/core/rendering/RenderMultiColumnSet.cpp
index 52d11aa6acafd79f4f22911f611da36e652d31ae..6ca4a4e4af828bdb409393b2bff07f82ef9e4cf6 100644
--- a/Source/core/rendering/RenderMultiColumnSet.cpp
+++ b/Source/core/rendering/RenderMultiColumnSet.cpp
@@ -131,11 +131,11 @@ unsigned RenderMultiColumnSet::findRunWithTallestColumns() const
 
 void RenderMultiColumnSet::distributeImplicitBreaks()
 {
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     // There should be no implicit breaks assumed at this point.
     for (unsigned i = 0; i < m_contentRuns.size(); i++)
         ASSERT(!m_contentRuns[i].assumedImplicitBreaks());
-#endif // NDEBUG
+#endif // ENABLE(ASSERT)
 
     // Insert a final content run to encompass all content. This will include overflow if this is
     // the last set.