Allow assertions to be enabled in Blink Release builds.

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index d7b4a1239835cec7ba4f6b992c0368b535cda941..d360cfb84990326dd3ea09bd385472ad151060e2 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -2629,7 +2629,7 @@ DOMStringMap& Element::dataset()
 
 KURL Element::getURLAttribute(const QualifiedName& name) const
 {
-#if ASSERT_ENABLED
+#if ENABLE(ASSERT)
     if (elementData()) {
         if (const Attribute* attribute = attributes().find(name))
             ASSERT(isURLAttribute(*attribute));
@@ -2640,7 +2640,7 @@ KURL Element::getURLAttribute(const QualifiedName& name) const
 
 KURL Element::getNonEmptyURLAttribute(const QualifiedName& name) const
 {
-#if ASSERT_ENABLED
+#if ENABLE(ASSERT)
     if (elementData()) {
         if (const Attribute* attribute = attributes().find(name))
             ASSERT(isURLAttribute(*attribute));
@@ -2772,7 +2772,7 @@ bool Element::isSpellCheckingEnabled() const
     return true;
 }
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
 bool Element::fastAttributeLookupAllowed(const QualifiedName& name) const
 {
     if (name == HTMLNames::styleAttr)