Run `gn format` on all BUILD.gn files.

NO_IFTTT=Formatting change only

Link: https://chromium-review.googlesource.com/id/I94ec311d69c76b9f85351c08b4d3bd216a6a6964
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7858711
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Owners-Override: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Matt Stark <msta@google.com>
SLSA-Policy-Verified: SLSA Policy Verification Service <devtools-gerritcodereview-exitgate@google.com>
Reviewed-by: Junji Watanabe <jwata@google.com>
Cr-Commit-Position: refs/heads/main@{#1632679}
NOKEYCHECK=True
GitOrigin-RevId: ad14f9bebfdee678ba25da9430c2d5c3b00d6a11