Bug 236520 does not depend on any bugs.

Bug 236520 blocks 3 bugs:

•    236520: [GTK] [WPE] Fix problem when the buffer object is released before we try to send it to the compositor [RESOLVED FIXED; assigned to alex]
  •    237649: [Meta][Linux] Adoption of DMABuf as a reference buffer sharing mechanism [NEW; assigned to webkit-unassigned]
    •    238593: [GTK][WPE] GPUProcess support [NEW; assigned to webkit-unassigned]
    •    244472: [GTK][WPE] Switch to using ANGLE [NEW; assigned to webkit-unassigned]