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This reduces the byte size of TextureDrawQuad using 1 bit for booleans
members and 2 bits for an enum with 4 values.

Since QuadList uses the size of the biggest DrawQuad to allocate any
quad, this CL will reduce the memory used by QuadList, even if
TextureDrawQuads are not used.

Bug: None

Change-Id: Ic89e932a582c1a25e530d838e7d5a9f3c68d6462
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2058835Reviewed-by: ccameron <ccameron@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Daniele Castagna <dcastagna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742649}