[GN] Set v8_use_external_snapshot_data for the same configurations as GN.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index dba8519d7d187907e959e17664431ece042acd11..0cdb77a99b70eb45131003c51b7f252e23fd3abd 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -5,6 +5,7 @@
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
+import("//build/module_args/v8.gni")
 import("//url/config.gni")
 
 # TODO(cjhopman): //build/config/android/rules.gni also imports grit_rule.gni.
@@ -1185,6 +1186,10 @@ if (!is_android && !is_win && !is_mac) {
       ]
     }
 
+    if (v8_use_external_startup_data) {
+      deps += [ "//gin" ]
+    }
+
     if (!use_nss_certs) {
       sources -= [ "ssl/client_cert_store_nss_unittest.cc" ]
       if (is_chromeos) {  # Already removed for all non-ChromeOS builds.