This patch implements a micro DAWN_SKIP_TEST_IF in DawnTest.h which
can be used to skip running a test in dawn_end2end_tests when the
given condition is satisfied.
Also moves the TerribleCommandBuffer to utils:: because it isn't part of
the implementation of the wire, renames dawn::wire to dawn_wire, moves
src/wire to src/dawn_wire and puts the interface of dawn_wire in
src/include/dawn_wire.
Corentin Wallez
Jiawei Shao