deps: fix inspector v8 test

This fixes the inspector tests failing after the cherry-pick.

V8 commit: f19b889be8
PR-URL: https://github.com/nodejs/node/pull/14827
Fixes: https://github.com/nodejs/node/issues/14824
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

deps/v8/test/inspector/isolate-data.cc

@@ -93,3 +93,10 @@ v8::MaybeLocal<v8::Module> IsolateData::ModuleResolveCallback(
   IsolateData* data = IsolateData::FromContext(context);
   return data->modules_[ToVector(specifier)].Get(data->isolate_);
 }
+
+void IsolateData::FreeContext(v8::Local<v8::Context> context) {
+  int context_group_id = GetContextGroupId(context);
+  auto it = contexts_.find(context_group_id);
+  if (it == contexts_.end()) return;
+  contexts_.erase(it);
+}

deps/v8/test/inspector/isolate-data.h

@@ -39,6 +39,7 @@ class IsolateData {
   void RegisterModule(v8::Local<v8::Context> context,
                       v8::internal::Vector<uint16_t> name,
                       v8::ScriptCompiler::Source* source);
+  void FreeContext(v8::Local<v8::Context> context);
 
  private:
   struct VectorCompare {