[ast] Print class fields initializers in AstPrinter

Bug: v8:5367
Change-Id: I0c86d7204301665412ef0ef370eb1f0c61123031
Reviewed-on: https://chromium-review.googlesource.com/774264Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49407}

src/ast/prettyprinter.cc

@@ -738,6 +738,10 @@ const char* AstPrinter::PrintProgram(FunctionLiteral* program) {
     if (program->raw_inferred_name()) {
       PrintLiteralIndented("INFERRED NAME", program->raw_inferred_name(), true);
     }
+    if (program->instance_class_fields_initializer() != nullptr) {
+      PrintIndentedVisit("INSTANCE FIELDS INITIALIZER",
+                         program->instance_class_fields_initializer());
+    }
     PrintParameters(program->scope());
     PrintDeclarations(program->scope()->declarations());
     PrintStatements(program->body());
@@ -991,6 +995,18 @@ void AstPrinter::VisitClassLiteral(ClassLiteral* node) {
   if (node->extends() != nullptr) {
     PrintIndentedVisit("EXTENDS", node->extends());
   }
+  if (node->static_fields_initializer() != nullptr) {
+    PrintIndentedVisit("STATIC FIELDS INITIALIZER",
+                       node->static_fields_initializer());
+  }
+  if (node->instance_fields_initializer_function() != nullptr) {
+    PrintIndentedVisit("INSTANCE FIELDS INITIALIZER",
+                       node->instance_fields_initializer_function());
+  }
+  if (node->instance_fields_initializer_proxy() != nullptr) {
+    PrintIndentedVisit("INSTANCE FIELDS INITIALIZER VAR",
+                       node->instance_fields_initializer_proxy());
+  }
   PrintClassProperties(node->properties());
 }