cros: fix 'all' build meta-target

This meta-target had a couple of transitive dependencies on dawn,
despite dawn not being available on cros. This change makes those
dependencies conditional on `use_dawn`.

Bug: None
Change-Id: I630e8786ab21510a2caee54a85034591a215981a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1917380
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715328}

BUILD.gn

@@ -23,6 +23,7 @@ import("//remoting/remoting_enable.gni")
 import("//third_party/openh264/openh264_args.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 import("//ui/base/ui_features.gni")
+import("//ui/gl/features.gni")
 import("//ui/ozone/ozone.gni")
 import("//ui/webui/webui_features.gni")
 import("//v8/gni/snapshot_toolchain.gni")
@@ -141,8 +142,6 @@ group("gn_all") {
       "//third_party/SPIRV-Tools/src:SPIRV-Tools",
       "//third_party/SPIRV-Tools/src/test/fuzzers",
       "//third_party/cacheinvalidation:cacheinvalidation_unittests",
-      "//third_party/dawn:dawn_end2end_tests_temp_group",
-      "//third_party/dawn:dawn_unittests_temp_group",
       "//third_party/pdfium/samples:pdfium_test",
       "//tools/perf/clear_system_cache",
       "//tools/polymer:polymer_tools_python_unittests",
@@ -802,6 +801,13 @@ group("gn_all") {
     ]
   }
 
+  if (use_dawn) {
+    deps += [
+      "//third_party/dawn:dawn_end2end_tests_temp_group",
+      "//third_party/dawn:dawn_unittests_temp_group",
+    ]
+  }
+
   # PFFFT.
   deps += [
     "//third_party/pffft:fuzzers",

chrome/test/BUILD.gn

@@ -32,6 +32,7 @@ import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/widevine/cdm/widevine.gni")
 import("//ui/base/ui_features.gni")
+import("//ui/gl/features.gni")
 import("//ui/views/features.gni")
 import("//v8/gni/v8.gni")
 
@@ -2830,7 +2831,7 @@ group("dawn_perf_tests") {
   data_deps = [
     "//testing:run_perf_test",
   ]
-  if (is_win || is_linux || is_mac) {
+  if (use_dawn) {
     data_deps += [ "//third_party/dawn:dawn_perf_tests_temp_group" ]
   }
 }