[clang-tidy] Add override to overridden destructors

See
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-override.html
for more on this warning.

Bug: v8:10488
Change-Id: Ia2bf5c1ec84dd4473d0e013ec3d22548b38a0578
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2211190Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67983}

src/profiler/cpu-profiler.h

@@ -156,7 +156,7 @@ class ProfilerCodeObserver;
 class V8_EXPORT_PRIVATE ProfilerEventsProcessor : public base::Thread,
                                                   public CodeEventObserver {
  public:
-  virtual ~ProfilerEventsProcessor();
+  ~ProfilerEventsProcessor() override;
 
   void CodeEventHandler(const CodeEventsContainer& evt_rec) override;