Add //chrome/browser/ui to "gn check".

chrome/app/BUILD.gn

Index: chrome/app/BUILD.gn
diff --git a/chrome/app/BUILD.gn b/chrome/app/BUILD.gn
index 561037271f62c8367c48a0959a2a8c691eeace9e..36423506f9cb58c3e99f596d0c6f31a0948ba5a3 100644
--- a/chrome/app/BUILD.gn
+++ b/chrome/app/BUILD.gn
@@ -13,6 +13,19 @@ source_set("command_ids") {
   ]
 }
 
+# On Windows, links chrome_dll.rc. On other platforms, does nothing so you can
+# unconditionally depend on it.
+source_set("chrome_dll_resources") {
+  # This source is added unconditionally for include checking on non-Windows
+  # platforms.
+  sources = [
+    "chrome_dll_resource.h",
+  ]
+  if (is_win) {
+    sources += [ "chrome_dll.rc" ]
+  }
+}
+
 if (is_android) {
   import("//build/config/android/rules.gni")
   android_generated_java_resources = [