Disable CORS preflight request upon command line flag #14812

Job	Run time
raspi-2 / initialize	53s
raspi-2-skia / initialize	46s
raspi-2-skia / docker-build-image	1m 37s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / docker-build-image	1m 41s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / raspi-2-skia_devel	10m 58s
raspi-2-skia / raspi-2-skia_debug	14m 55s
raspi-2-skia / raspi-2-skia_qa	9m 32s
raspi-2-skia / raspi-2-skia_gold	8m 51s
raspi-2 / raspi_devel	10m 18s
raspi-2 / raspi_debug	14m 27s
raspi-2 / raspi_qa	9m 6s
raspi-2 / raspi_gold	8m 59s
raspi-2 / sbversion-15_devel	10m 9s
raspi-2 / sbversion-15_debug	13m 56s
raspi-2 / sbversion-15_qa	9m 23s
raspi-2 / sbversion-15_gold	8m 56s
raspi-2 / sbversion-16_devel	10m 37s
raspi-2 / sbversion-16_debug	15m 7s
raspi-2 / sbversion-16_qa	9m 31s
raspi-2 / sbversion-16_gold	9m 9s
raspi-2 / sbversion-17_devel	10m 16s
raspi-2 / sbversion-17_debug	14m 17s
raspi-2 / sbversion-17_qa	10m 17s
raspi-2 / sbversion-17_gold	9m 22s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
	3h 43m 3s

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