[api] Restore the simple version of Message::GetEndColumn API.

This also undeprecates Message::GetStartColumn API.

The simple versions are easier to use for the embedders and have the
same implementation as the complex versions.

Bug: v8:7560
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I656161b04c5d9de6d1de9435b7825009f96572a5
Reviewed-on: https://chromium-review.googlesource.com/963322
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51951}

include/v8.h

@@ -1645,13 +1645,14 @@ class V8_EXPORT Message {
    * Returns the index within the line of the first character where
    * the error occurred.
    */
-  V8_DEPRECATED("Use maybe version", int GetStartColumn() const);
+  int GetStartColumn() const;
   V8_WARN_UNUSED_RESULT Maybe<int> GetStartColumn(Local<Context> context) const;
 
   /**
    * Returns the index within the line of the last character where
    * the error occurred.
    */
+  int GetEndColumn() const;
   V8_WARN_UNUSED_RESULT Maybe<int> GetEndColumn(Local<Context> context) const;
 
   /**

src/api.cc

@@ -2892,34 +2892,34 @@ int Message::ErrorLevel() const {
   return self->error_level();
 }
 
-Maybe<int> Message::GetStartColumn(Local<Context> context) const {
+int Message::GetStartColumn() const {
   auto self = Utils::OpenHandle(this);
   i::Isolate* isolate = self->GetIsolate();
   ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
   EscapableHandleScope handle_scope(reinterpret_cast<Isolate*>(isolate));
   auto msg = i::Handle<i::JSMessageObject>::cast(self);
-  return Just(msg->GetColumnNumber());
+  return msg->GetColumnNumber();
 }
 
-
-int Message::GetStartColumn() const {
-  auto context = ContextFromHeapObject(Utils::OpenHandle(this));
-  const int default_value = kNoColumnInfo;
-  return GetStartColumn(context).FromMaybe(default_value);
+Maybe<int> Message::GetStartColumn(Local<Context> context) const {
+  return Just(GetStartColumn());
 }
 
-
-Maybe<int> Message::GetEndColumn(Local<Context> context) const {
+int Message::GetEndColumn() const {
   auto self = Utils::OpenHandle(this);
   i::Isolate* isolate = self->GetIsolate();
   ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
   EscapableHandleScope handle_scope(reinterpret_cast<Isolate*>(isolate));
   auto msg = i::Handle<i::JSMessageObject>::cast(self);
   const int column_number = msg->GetColumnNumber();
-  if (column_number == -1) return Just(-1);
+  if (column_number == -1) return -1;
   const int start = self->start_position();
   const int end = self->end_position();
-  return Just(column_number + (end - start));
+  return column_number + (end - start);
+}
+
+Maybe<int> Message::GetEndColumn(Local<Context> context) const {
+  return Just(GetEndColumn());
 }