When showing a context menu via gesture, RootView sends ui::MENU_SOURCE_TOUCH regardless of whether the event was a two finger tap or long press.

ui::MENU_SOURCE_TOUCH is sent here[0]

We have the extra granularity[1]. Why not use it? This would allow for better handling down stream.

[0]
https://cs.chromium.org/chromium/src/ui/views/widget/root_view.cc?sq=package:chromium&g=0&l=138

[1]
https://cs.chromium.org/chromium/src/ui/base/ui_base_types.h?l=52&gsn=MENU_SOURCE_TOUCH