[turbofan] Funnel class constructors through TurboFan.

src/ast/ast-numbering.cc

Index: src/ast/ast-numbering.cc
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
index e1b11f655a844f2f92f9557db9c85bd7215a8e4d..e0069f81ac8d8137070379f7a525f2515d04da8a 100644
--- a/src/ast/ast-numbering.cc
+++ b/src/ast/ast-numbering.cc
@@ -600,6 +600,10 @@ bool AstNumberingVisitor::Renumber(FunctionLiteral* node) {
     }
   }
 
+  if (IsClassConstructor(node->kind())) {
+    DisableCrankshaft(kClassConstructorFunction);
+  }
+
   VisitDeclarations(scope->declarations());
   VisitStatements(node->body());