[Fuchsia] Enable NativePixmap factory

Now GpuMemoryBufferFactory::CreateNativeType() will create
GpuMemoryBufferFactoryNativePixmap on Fuchsia. NativePixmap are not
actually created yet since
OzonePlatformScenic::IsNativePixmapConfigSupported() always returns
false.

Bug: 852011
Change-Id: Ibdeb46a0ed1eeec60fcd71e1ffb7b303fae98825
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1570905
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#651622}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 3a96f3b3d4c1fe8a3629d2c3eb6b9fa66f78f015
2 files changed