[fuchsia] Add an explicit deps to Chrome in //:gn_all

Previously, the only targets dependent on //chrome/app:chrome_fuchsia
were Chrome and Content tests, and there was no path from //:gn_all.
Although there are cross-platform deps on //chrome/installer and
//chrome/updater, these do not apply to Fuchsia.

Bug: 1081525
Change-Id: I05ce491ccfbee724a76d10e2369258904f462823
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3709134
Auto-Submit: David Dorwin <ddorwin@chromium.org>
Commit-Queue: Erik Staab <estaab@chromium.org>
Reviewed-by: Erik Staab <estaab@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1014791}

diff --git a/BUILD.gn b/BUILD.gn
index 6b95d21a..d8f24c32 100644
--- a/BUILD.gn
+++ b/BUILD.gn

@@ -259,6 +259,7 @@
     deps += [
       ":d8_fuchsia",
       "//build/fuchsia/cipd",
+      "//chrome/app:chrome_fuchsia",
       "//fuchsia_web:gn_all",
       "//tools/fuchsia/size_tests:fuchsia_sizes",