WIP Add memory optimisation option to ConsumeCommaSeparatedList

third_party/WebKit/Source/build/scripts/templates/StyleBuilderFunctions.cpp.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/StyleBuilderFunctions.cpp.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/StyleBuilderFunctions.cpp.tmpl b/third_party/WebKit/Source/build/scripts/templates/StyleBuilderFunctions.cpp.tmpl
index 8cedb1cd881f869cb7f41e3fa066c531283cc0ba..1d7d53fd38add2c2eae6497469ed71d5063ff2be 100644
--- a/third_party/WebKit/Source/build/scripts/templates/StyleBuilderFunctions.cpp.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/StyleBuilderFunctions.cpp.tmpl
@@ -114,6 +114,7 @@ namespace blink {
 {{declare_value_function(property_id)}} {
   CSS{{animation}}Data& data = state.Style()->Access{{animation}}s();
   data.{{vector}}.clear();
+  DCHECK(value.IsBaseValueList());
   for (auto& listValue : ToCSSValueList(value))
     data.{{vector}}.push_back(CSSToStyleMap::MapAnimation{{attribute}}(*listValue));
 }