Remove ASSERT_WITH_MESSAGE family.

third_party/WebKit/Source/core/animation/StringKeyframe.cpp

Index: third_party/WebKit/Source/core/animation/StringKeyframe.cpp
diff --git a/third_party/WebKit/Source/core/animation/StringKeyframe.cpp b/third_party/WebKit/Source/core/animation/StringKeyframe.cpp
index 15f6d7e56ea52f8c6cd48eb709842c5e44c441e1..485b2bd3868e20d1e13ab52b9bf4eabe58279754 100644
--- a/third_party/WebKit/Source/core/animation/StringKeyframe.cpp
+++ b/third_party/WebKit/Source/core/animation/StringKeyframe.cpp
@@ -60,9 +60,9 @@ PropertyHandleSet StringKeyframe::properties() const
     PropertyHandleSet properties;
     for (unsigned i = 0; i < m_cssPropertyMap->propertyCount(); ++i) {
         StylePropertySet::PropertyReference propertyReference = m_cssPropertyMap->propertyAt(i);
-        ASSERT_WITH_MESSAGE(
-            !isShorthandProperty(propertyReference.id()) || propertyReference.value()->isVariableReferenceValue(),
-            "Web Animations: Encountered unexpanded shorthand CSS property (%d).", propertyReference.id());
+        DCHECK(
+            !isShorthandProperty(propertyReference.id()) || propertyReference.value()->isVariableReferenceValue())
+            << "Web Animations: Encountered unexpanded shorthand CSS property (" << propertyReference.id() << ").";
         properties.add(PropertyHandle(propertyReference.id(), false));
     }