Create objects in the correct context

The exception meta-data API created several objects in the wrong
context, resulting in the exception context being kept alive for
too long.

Bug: chromium:1221089
Change-Id: I02aece4e10d9bd559d49f98fe1c3e44a09e27eef
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2975301Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75269}

src/inspector/v8-inspector-impl.cc

@@ -509,6 +509,7 @@ bool V8InspectorImpl::associateExceptionData(v8::Local<v8::Context>,
                                              v8::Local<v8::Value> value) {
   v8::Local<v8::Context> context;
   if (!exceptionMetaDataContext().ToLocal(&context)) return false;
+  v8::Context::Scope contextScope(context);
   v8::HandleScope handles(m_isolate);
   if (m_exceptionMetaData.IsEmpty())
     m_exceptionMetaData.Reset(m_isolate, v8::debug::WeakMap::New(m_isolate));