Intent to Deprecate and Remove: PPAPI (Pepper) WebSocket
Adam Rice
# Primary eng emails
ri...@chromium.org, yhi...@chromium.org
# Summary
Remove the pp::WebSocket PPAPI which provides a bridge to the WebSocket protocol to NaCl and PNaCl applications. The web platform WebSocket API will not be deprecated.
# Motivation
The implementation of pp::WebSocket contains a great deal of legacy code. In particular, it is the only WebSocket-related use of legacy IPC. Among pepper APIs it has 0.00% usage, meaning there is no value in updating it to use mojo IPC.
The API is under-tested and no-one is left with the expertise to solve any problems that arise.
The Blink-side WebSocket implementation has been considerably simplified, but this legacy API is blocking further simplification efforts.
# Interoperability and Compatibility Risk
This API is only implemented in Chromium. Removing it will improve interoperability.
It is already deprecated on platforms other than Chromium OS.
Usage of the API is tiny, but non-zero. There may still be some apps which depend on it.
# Alternative implementation suggestion for web developers
It is theoretically possible to emulate it using the pp::Instance::PostMessage() API.
# Usage information from UseCounter
The Pepper.InterfaceUsed UseCounter shows the percentage of processes that have loaded the API over the last 28 days is 0.002%.
# Entry on the feature dashboard
Not applicable (not a web platform API).
# Requesting approval to remove too?
Yes.
Philip Jägenstedt
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Chris Harrelson
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Daniel Bratell
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