Currently there is a native tool to take screenshots in Chrome, but it is hidden in the Chrome developer tools so few know about.
There is a patch in Chromium Gerrit that seeks to centralize all the sharing options in a submenu and according to that same patch, the option to take screenshots will be included in that submenu:
As you can read in the patch, the submenu will also appear in the tab context menu.
According to another commit, the tool to take screenshots might have an option to capture only a region of the screen and apparently options to edit the screenshot as well (just like in Chrome for Android I guess).
Other browsers like Edge have native tools for taking screenshots (Web capture) so it was simply a matter of time before Google added this option.