components: Cleanup gn check errors on 'bookmarks' component.

components/bookmarks/browser/BUILD.gn

Index: components/bookmarks/browser/BUILD.gn
diff --git a/components/bookmarks/browser/BUILD.gn b/components/bookmarks/browser/BUILD.gn
index 18f84bf5d6604893ed7df0bf323e58d675575d99..de42cbeacca66eb2a6600558062f782966b28c54 100644
--- a/components/bookmarks/browser/BUILD.gn
+++ b/components/bookmarks/browser/BUILD.gn
@@ -39,6 +39,8 @@ source_set("browser") {
 
   deps = [
     "//base",
+    "//base:i18n",
+    "//base:prefs",
     "//components/bookmarks/common",
     "//components/favicon_base",
     "//components/keyed_service/core",
@@ -72,7 +74,13 @@ source_set("unit_tests") {
 
   deps = [
     ":browser",
+    "//base:prefs",
+    "//base:prefs_test_support",
+    "//components/bookmarks/common",
+    "//components/bookmarks/test",
+    "//components/pref_registry",
     "//testing/gtest",
     "//ui/base",
+    "//url",
   ]
 }