[cleanup] Refactor debug to use default members.

Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I1fdd9210d92725701f413ff410e3a39d96bccf66
Reviewed-on: https://chromium-review.googlesource.com/1224111
Commit-Queue: Florian Sattler <sattlerf@google.com>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55986}

src/debug/debug-coverage.h

@@ -63,7 +63,7 @@ class Coverage : public std::vector<CoverageScript> {
   static std::unique_ptr<Coverage> Collect(
       Isolate* isolate, v8::debug::Coverage::Mode collectionMode);
 
-  Coverage() {}
+  Coverage() = default;
 };
 
 }  // namespace internal

src/debug/debug-interface.h

@@ -156,7 +156,7 @@ MaybeLocal<UnboundScript> CompileInspectorScript(Isolate* isolate,
 
 class DebugDelegate {
  public:
-  virtual ~DebugDelegate() {}
+  virtual ~DebugDelegate() = default;
   virtual void ScriptCompiled(v8::Local<Script> script, bool is_live_edited,
                               bool has_compile_error) {}
   // |inspector_break_points_hit| contains id of breakpoints installed with
@@ -179,7 +179,7 @@ void SetDebugDelegate(Isolate* isolate, DebugDelegate* listener);
 
 class AsyncEventDelegate {
  public:
-  virtual ~AsyncEventDelegate() {}
+  virtual ~AsyncEventDelegate() = default;
   virtual void AsyncEventOccurred(debug::DebugAsyncActionType type, int id,
                                   bool is_blackboxed) = 0;
 };

src/debug/debug-stack-trace-iterator.cc

@@ -35,7 +35,7 @@ DebugStackTraceIterator::DebugStackTraceIterator(Isolate* isolate, int index)
   for (; !Done() && index > 0; --index) Advance();
 }
 
-DebugStackTraceIterator::~DebugStackTraceIterator() {}
+DebugStackTraceIterator::~DebugStackTraceIterator() = default;
 
 bool DebugStackTraceIterator::Done() const { return iterator_.done(); }
 

src/debug/debug-type-profile.h

@@ -36,7 +36,7 @@ class TypeProfile : public std::vector<TypeProfileScript> {
   static void SelectMode(Isolate* isolate, debug::TypeProfile::Mode mode);
 
  private:
-  TypeProfile() {}
+  TypeProfile() = default;
 };
 
 }  // namespace internal

src/debug/interface-types.h

@@ -60,7 +60,7 @@ struct WasmDisassemblyOffsetTableEntry {
 
 struct WasmDisassembly {
   using OffsetTable = std::vector<WasmDisassemblyOffsetTableEntry>;
-  WasmDisassembly() {}
+  WasmDisassembly() = default;
   WasmDisassembly(std::string disassembly, OffsetTable offset_table)
       : disassembly(std::move(disassembly)),
         offset_table(std::move(offset_table)) {}

test/cctest/test-debug.cc

@@ -3003,7 +3003,7 @@ int event_listener_hit_count = 0;
 class EmptyExternalStringResource : public v8::String::ExternalStringResource {
  public:
   EmptyExternalStringResource() { empty_[0] = 0; }
-  ~EmptyExternalStringResource() override {}
+  ~EmptyExternalStringResource() override = default;
   size_t length() const override { return empty_.length(); }
   const uint16_t* data() const override { return empty_.start(); }