Ensure we never inline class constructors in Crankshaft, as it currently is entirely unsupported.

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index fd7f5e6b93a00d2867f4a00f3d40b905038e250b..857b0db874c4902afa30a6b0be0b1cac09d65291 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -9849,6 +9849,7 @@ void HOptimizedGraphBuilder::BuildInlinedCallArray(
 // Checks whether allocation using the given constructor can be inlined.
 static bool IsAllocationInlineable(Handle<JSFunction> constructor) {
   return constructor->has_initial_map() &&
+         !IsClassConstructor(constructor->shared()->kind()) &&
          constructor->initial_map()->instance_type() == JS_OBJECT_TYPE &&
          constructor->initial_map()->instance_size() <
              HAllocate::kMaxInlineSize;