Put more files under the enable_service_discovery build flag.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index cdc18ec5ab7cecbcda6516ec6105aef80a89d41b..e8d2a0f5cbd66bbdbce66977aea72226fedb86f3 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -1228,6 +1228,12 @@ if (!is_android) {
               ".",
               "//chrome")
     }
+    if (enable_service_discovery) {
+      sources += rebase_path(
+              chrome_tests_gypi_values.chrome_browser_tests_service_discovery_sources,
+              ".",
+              "//chrome")
+    }
     if (enable_supervised_users) {
       sources += rebase_path(
               chrome_tests_gypi_values.chrome_browser_tests_supervised_user_sources,
@@ -1713,6 +1719,12 @@ test("unit_tests") {
               ".",
               "//chrome")
     }
+    if (enable_service_discovery) {
+      sources += rebase_path(
+              chrome_tests_unit_gypi_values.chrome_unit_tests_extensions_service_discovery_sources,
+              ".",
+              "//chrome")
+    }
     if (!is_chromeos) {
       sources += rebase_path(
               chrome_tests_unit_gypi_values.chrome_unit_tests_extensions_non_chromeos_sources,
@@ -2028,7 +2040,6 @@ test("unit_tests") {
   }
   if (is_android || is_ios) {
     sources -= [
-      "../browser/devtools/device/cast_device_provider_unittest.cc",
       "../browser/ui/bookmarks/bookmark_ui_utils_desktop_unittest.cc",
       "../browser/ui/sync/sync_promo_ui_unittest.cc",
     ]