1757339 - Reorganize files in mozglue/misc

Status: NEW

(Core :: MFBT, task)

Description

[Gerald Squelart (he/him) (not at Mozilla since 2022-09-15)]

Spawned from https://phabricator.services.mozilla.com/D139669#inline-768604

Some ideas to rearrange files:

• At least use the same base name for .h and .cpp, so it's clearer where things are declared and defined. Currently we have headers like PlatformMutex.h being implemented in Mutex_posix.cpp (and others), with bits in MutexPlatformData_posix.h (and others).
• Consider combining per-platform files.

Other suggestions welcome.