[inspector] Turn DCHECK into CHECK in asyncStepOutOfFunction().

This is an attempt to get a better understanding of the random crashes
we get in chromium:893973.

Bug: chromium:893973
Change-Id: Ia3b1e9910c9e48efb0bf3233050953f1117a2db9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1876819
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64543}

src/inspector/v8-debugger.cc

@@ -297,7 +297,7 @@ bool V8Debugger::asyncStepOutOfFunction(int targetContextGroupId,
                                         bool onlyAtReturn) {
   v8::HandleScope handleScope(m_isolate);
   auto iterator = v8::debug::StackTraceIterator::Create(m_isolate);
-  DCHECK(!iterator->Done());
+  CHECK(!iterator->Done());
   bool atReturn = !iterator->GetReturnValue().IsEmpty();
   iterator->Advance();
   // Synchronous stack has more then one frame.