Enable viz_unittests compilation on Fuchsia.

Bug: 961455
Change-Id: I4688d7ab7faccefb5814de7e08430f143cb39b43
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1603843Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658787}

BUILD.gn

@@ -157,6 +157,10 @@ group("gn_all") {
     deps += [
       "//cc:cc_unittests",
       "//components/policy:policy_templates",
+      "//components/ui_devtools/viz",
+      "//components/viz:viz_perftests",
+      "//components/viz:viz_unittests",
+      "//components/viz/common:viz_benchmark",
       "//content/shell:content_shell",
       "//content/test:content_browsertests",
       "//content/test:content_perftests",
@@ -191,10 +195,6 @@ group("gn_all") {
       "//chrome/test:telemetry_perf_unittests",
       "//chrome/test:unit_tests",
       "//components:components_browsertests",
-      "//components/ui_devtools/viz",
-      "//components/viz:viz_perftests",
-      "//components/viz:viz_unittests",
-      "//components/viz/common:viz_benchmark",
       "//device:device_unittests",
       "//google_apis/gcm:mcs_probe",
       "//media/capture:capture_unittests",