Chalcorana megalonesa Large White-lipped Frog
Some other names for this species:
White-lipped Stream Frog
Chalcorana megalonesa is one of several similar-looking species split from the Rana "chalconata" species complex. It differs from Chalcorana raniceps primarily in size.
Santubong Peninsula, Sarawak, MalaysiaJanuary 28, 2017
Large White-lipped Frog (Chalcorana megalonesa)
My not completely reliable memory tells me that this specimen was large enough that it must have been Chalcorana megalonesa rather than Chalcorana raniceps, but I wouldn't place a large bet on that.

My Travelogues and Trip Lists page includes a complete list of the herps I saw in the wild on this trip to Malaysia, as well as a travelogue of the trip.

Kubah National Park, Sarawak, MalaysiaFebruary 18, 2018
Large White-lipped Frog (Chalcorana megalonesa)
This was a big 'un, and my understanding is that the lack of green on the back is also a pretty good indicator that this is C. megalonesa rather than C. raniceps.
Online references:
Printed references: