2776ee7be4
The code to enable the XNNPACK delegate when the right build flags are set was accidentally removed in the final version of r1266242. This change restores that code and refactors the buildflag header target so that the state of the build_tflite_with_xnnpack flag defined in //third_party/tflite/features.gni is available in a buildflag header without depending on //components/optimization_guide. Bug: 326356909 Change-Id: I609488f260b6844452416a592edcb7cd455cb40e Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5363635 Reviewed-by: Robert Ogden <robertogden@chromium.org> Reviewed-by: Nasko Oskov <nasko@chromium.org> Auto-Submit: Reilly Grant <reillyg@chromium.org> Commit-Queue: Reilly Grant <reillyg@chromium.org> Cr-Commit-Position: refs/heads/main@{#1272511}