[cleanup] Refactor regexp profiler to use default members.

Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: If912b9d43f577ca3e9f3b8b27acf957c49e269dc
Reviewed-on: https://chromium-review.googlesource.com/1224113Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#55979}

src/regexp/jsregexp.cc

@@ -2168,10 +2168,7 @@ static void EmitCharClass(RegExpMacroAssembler* macro_assembler,
   macro_assembler->Bind(&fall_through);
 }
 
-
-RegExpNode::~RegExpNode() {
-}
-
+RegExpNode::~RegExpNode() = default;
 
 RegExpNode::LimitResult RegExpNode::LimitVersions(RegExpCompiler* compiler,
                                                   Trace* trace) {

src/regexp/jsregexp.h

@@ -1398,7 +1398,7 @@ struct PreloadState {
 
 class NodeVisitor {
  public:
-  virtual ~NodeVisitor() { }
+  virtual ~NodeVisitor() = default;
 #define DECLARE_VISIT(Type)                                          \
   virtual void Visit##Type(Type##Node* that) = 0;
 FOR_EACH_NODE_TYPE(DECLARE_VISIT)

src/regexp/regexp-ast.h

@@ -39,7 +39,7 @@ class RegExpTree;
 
 class RegExpVisitor {
  public:
-  virtual ~RegExpVisitor() {}
+  virtual ~RegExpVisitor() = default;
 #define MAKE_CASE(Name) \
   virtual void* Visit##Name(RegExp##Name*, void* data) = 0;
   FOR_EACH_REG_EXP_TREE_TYPE(MAKE_CASE)
@@ -195,7 +195,7 @@ class TextElement final {
 class RegExpTree : public ZoneObject {
  public:
   static const int kInfinity = kMaxInt;
-  virtual ~RegExpTree() {}
+  virtual ~RegExpTree() = default;
   virtual void* Accept(RegExpVisitor* visitor, void* data) = 0;
   virtual RegExpNode* ToNode(RegExpCompiler* compiler,
                              RegExpNode* on_success) = 0;
@@ -577,7 +577,7 @@ class RegExpBackReference final : public RegExpTree {
 
 class RegExpEmpty final : public RegExpTree {
  public:
-  RegExpEmpty() {}
+  RegExpEmpty() = default;
   void* Accept(RegExpVisitor* visitor, void* data) override;
   RegExpNode* ToNode(RegExpCompiler* compiler, RegExpNode* on_success) override;
   RegExpEmpty* AsEmpty() override;

src/regexp/regexp-macro-assembler-tracer.cc

@@ -20,10 +20,7 @@ RegExpMacroAssemblerTracer::RegExpMacroAssemblerTracer(
   PrintF("RegExpMacroAssembler%s();\n", impl_names[type]);
 }
 
-
-RegExpMacroAssemblerTracer::~RegExpMacroAssemblerTracer() {
-}
-
+RegExpMacroAssemblerTracer::~RegExpMacroAssemblerTracer() = default;
 
 void RegExpMacroAssemblerTracer::AbortedCodeGeneration() {
   PrintF(" AbortedCodeGeneration\n");

src/regexp/regexp-macro-assembler.cc

@@ -23,10 +23,7 @@ RegExpMacroAssembler::RegExpMacroAssembler(Isolate* isolate, Zone* zone)
       isolate_(isolate),
       zone_(zone) {}
 
-
-RegExpMacroAssembler::~RegExpMacroAssembler() {
-}
-
+RegExpMacroAssembler::~RegExpMacroAssembler() = default;
 
 int RegExpMacroAssembler::CaseInsensitiveCompareUC16(Address byte_offset1,
                                                      Address byte_offset2,
@@ -117,10 +114,7 @@ NativeRegExpMacroAssembler::NativeRegExpMacroAssembler(Isolate* isolate,
                                                        Zone* zone)
     : RegExpMacroAssembler(isolate, zone) {}
 
-
-NativeRegExpMacroAssembler::~NativeRegExpMacroAssembler() {
-}
-
+NativeRegExpMacroAssembler::~NativeRegExpMacroAssembler() = default;
 
 bool NativeRegExpMacroAssembler::CanReadUnaligned() {
   return FLAG_enable_regexp_unaligned_accesses && !slow_safe();