build: [gn] link child as well as browser in electron_lib

BUILD.gn

@@ -217,7 +217,8 @@ static_library("electron_lib") {
     "//components/printing/common",
     "//components/security_state/content",
     "//components/viz/service",
-    "//content/public/browser",
+    "//content/public/app:both",
+    "//content/public/child",
     "//device/geolocation",
     "//gin",
     "//net:net_resources",