Delete descriptionForTrustedType from ValueMirror

In a previous CL the logic for generating the description for Trusted Types was added to Blink. Therefore, the corresponding logic remaining in V8 can be deleted safely.

Previous CL: https://chromium-review.googlesource.com/c/v8/v8/+/2502342

Bug: chromium:1048143
Change-Id: I1693fa1d213066cbc1fe822f890d2d7aaf7ce0f6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2502869Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Alfonso Castaño <alcastano@google.com>
Cr-Commit-Position: refs/heads/master@{#71173}

src/inspector/value-mirror.cc

@@ -1739,18 +1739,6 @@ String16 descriptionForNode(v8::Local<v8::Context> context,
   return description;
 }
 
-String16 descriptionForTrustedType(v8::Local<v8::Context> context,
-                                   v8::Local<v8::Value> value) {
-  if (!value->IsObject()) return String16();
-  v8::Local<v8::Object> object = value.As<v8::Object>();
-  v8::Isolate* isolate = context->GetIsolate();
-  v8::TryCatch tryCatch(isolate);
-
-  v8::Local<v8::String> description;
-  if (!object->ToString(context).ToLocal(&description)) return String16();
-  return toProtocolString(isolate, description);
-}
-
 std::unique_ptr<ValueMirror> clientMirror(v8::Local<v8::Context> context,
                                           v8::Local<v8::Value> value,
                                           const String16& subtype) {
@@ -1765,10 +1753,6 @@ std::unique_ptr<ValueMirror> clientMirror(v8::Local<v8::Context> context,
     return std::make_unique<ObjectMirror>(value, subtype,
                                           descriptionForNode(context, value));
   }
-  if (subtype == "trustedtype") {
-    return std::make_unique<ObjectMirror>(
-        value, subtype, descriptionForTrustedType(context, value));
-  }
   if (subtype == "error") {
     return std::make_unique<ObjectMirror>(
         value, RemoteObject::SubtypeEnum::Error,