[cleanup] Refactor profiler to use default members.

Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I5645a85ca7d85ca9abf2cde9ed4191b1ae06ca73
Reviewed-on: https://chromium-review.googlesource.com/1224170Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56046}

src/profiler/allocation-tracker.cc

@@ -75,11 +75,6 @@ AllocationTraceTree::AllocationTraceTree()
       root_(this, 0) {
 }
 
-
-AllocationTraceTree::~AllocationTraceTree() {
-}
-
-
 AllocationTraceNode* AllocationTraceTree::AddPathFromEnd(
     const Vector<unsigned>& path) {
   AllocationTraceNode* node = root();

src/profiler/allocation-tracker.h

@@ -57,7 +57,7 @@ class AllocationTraceNode {
 class AllocationTraceTree {
  public:
   AllocationTraceTree();
-  ~AllocationTraceTree();
+  ~AllocationTraceTree() = default;
   AllocationTraceNode* AddPathFromEnd(const Vector<unsigned>& path);
   AllocationTraceNode* root() { return &root_; }
   unsigned next_node_id() { return next_node_id_++; }

src/profiler/circular-queue-inl.h

@@ -16,11 +16,8 @@ SamplingCircularQueue<T, L>::SamplingCircularQueue()
       dequeue_pos_(buffer_) {
 }
 
-
-template<typename T, unsigned L>
-SamplingCircularQueue<T, L>::~SamplingCircularQueue() {
-}
-
+template <typename T, unsigned L>
+SamplingCircularQueue<T, L>::~SamplingCircularQueue() = default;
 
 template<typename T, unsigned L>
 T* SamplingCircularQueue<T, L>::Peek() {

src/profiler/cpu-profiler.h

@@ -106,7 +106,7 @@ class TickSampleEventRecord {
  public:
   // The parameterless constructor is used when we dequeue data from
   // the ticks buffer.
-  TickSampleEventRecord() { }
+  TickSampleEventRecord() = default;
   explicit TickSampleEventRecord(unsigned order) : order(order) { }
 
   unsigned order;

src/profiler/heap-snapshot-generator.cc

@@ -551,8 +551,6 @@ V8HeapExplorer::V8HeapExplorer(HeapSnapshot* snapshot,
       filler_(nullptr),
       global_object_name_resolver_(resolver) {}
 
-V8HeapExplorer::~V8HeapExplorer() = default;
-
 HeapEntry* V8HeapExplorer::AllocateEntry(HeapThing ptr) {
   return AddEntry(reinterpret_cast<HeapObject*>(ptr));
 }
@@ -2004,7 +2002,7 @@ class GlobalHandlesExtractor : public PersistentHandleVisitor {
  public:
   explicit GlobalHandlesExtractor(NativeObjectsExplorer* explorer)
       : explorer_(explorer) {}
-  ~GlobalHandlesExtractor() override {}
+  ~GlobalHandlesExtractor() override = default;
   void VisitPersistentHandle(Persistent<Value>* value,
                              uint16_t class_id) override {
     Handle<Object> object = Utils::OpenPersistent(value);
@@ -2109,7 +2107,7 @@ class NativeGroupRetainedObjectInfo : public v8::RetainedObjectInfo {
         hash_(reinterpret_cast<intptr_t>(label)),
         label_(label) {}
 
-  ~NativeGroupRetainedObjectInfo() override {}
+  ~NativeGroupRetainedObjectInfo() override = default;
   void Dispose() override {
     CHECK(!disposed_);
     disposed_ = true;

src/profiler/heap-snapshot-generator.h

@@ -117,7 +117,7 @@ class HeapEntry {
   };
   static const int kNoEntry;
 
-  HeapEntry() { }
+  HeapEntry() = default;
   HeapEntry(HeapSnapshot* snapshot,
             Type type,
             const char* name,
@@ -312,7 +312,7 @@ class V8HeapExplorer : public HeapEntriesAllocator {
   V8HeapExplorer(HeapSnapshot* snapshot,
                  SnapshottingProgressReportingInterface* progress,
                  v8::HeapProfiler::ObjectNameResolver* resolver);
-  ~V8HeapExplorer() override;
+  ~V8HeapExplorer() override = default;
   HeapEntry* AllocateEntry(HeapThing ptr) override;
   int EstimateObjectsCount();
   bool IterateAndExtractReferences(SnapshotFiller* filler);

src/profiler/sampling-heap-profiler.h

@@ -166,7 +166,7 @@ class SamplingAllocationObserver : public AllocationObserver {
         heap_(heap),
         random_(random),
         rate_(rate) {}
-  ~SamplingAllocationObserver() override {}
+  ~SamplingAllocationObserver() override = default;
 
  protected:
   void Step(int bytes_allocated, Address soon_object, size_t size) override {