[cleanup] Refactor ast to use default members.

Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: If9a66df529dc5870f6d5146d9a83d22367ffdc59
Reviewed-on: https://chromium-review.googlesource.com/1224114Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#55883}

src/ast/ast-function-literal-id-reindexer.cc

@@ -14,7 +14,7 @@ AstFunctionLiteralIdReindexer::AstFunctionLiteralIdReindexer(size_t stack_limit,
                                                              int delta)
     : AstTraversalVisitor(stack_limit), delta_(delta) {}
 
-AstFunctionLiteralIdReindexer::~AstFunctionLiteralIdReindexer() {}
+AstFunctionLiteralIdReindexer::~AstFunctionLiteralIdReindexer() = default;
 
 void AstFunctionLiteralIdReindexer::Reindex(Expression* pattern) {
   Visit(pattern);

src/ast/ast-source-ranges.h

@@ -56,7 +56,7 @@ enum class SourceRangeKind {
 
 class AstNodeSourceRanges : public ZoneObject {
  public:
-  virtual ~AstNodeSourceRanges() {}
+  virtual ~AstNodeSourceRanges() = default;
   virtual SourceRange GetRange(SourceRangeKind kind) = 0;
 };
 

src/ast/prettyprinter.cc

@@ -31,7 +31,7 @@ CallPrinter::CallPrinter(Isolate* isolate, bool is_user_js)
   InitializeAstVisitor(isolate);
 }
 
-CallPrinter::~CallPrinter() {}
+CallPrinter::~CallPrinter() = default;
 
 CallPrinter::ErrorHint CallPrinter::GetErrorHint() const {
   if (is_call_error_) {