Revert of Add all components to "gn check".

components/wifi_sync/BUILD.gn

Index: components/wifi_sync/BUILD.gn
diff --git a/components/wifi_sync/BUILD.gn b/components/wifi_sync/BUILD.gn
index 72ac120899b62cc0950d9305fd831c31a837c38a..034442895505a764e4ede950a14911a4ffb7e689 100644
--- a/components/wifi_sync/BUILD.gn
+++ b/components/wifi_sync/BUILD.gn
@@ -22,21 +22,20 @@
 
   deps = [
     "//base",
-    "//base:i18n",
-    "//components/keyed_service/content",
-    "//components/keyed_service/core",
     "//components/onc",
-    "//content/public/browser",
     "//sync",
   ]
-
-  if (is_chromeos) {
-    deps += [ "//chromeos" ]
-  }
 }
 
 source_set("unit_tests") {
   testonly = true
+
+  deps = [
+    ":wifi_sync",
+    "//sync",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
 
   sources = [
     "wifi_config_delegate_chromeos_unittest.cc",
@@ -45,14 +44,4 @@
     "wifi_security_class_chromeos_unittest.cc",
     "wifi_security_class_unittest.cc",
   ]
-
-  deps = [
-    ":wifi_sync",
-    "//base",
-    "//chromeos",
-    "//components/onc",
-    "//sync:test_support_sync_api",
-    "//testing/gmock",
-    "//testing/gtest",
-  ]
 }