Define gn variables to include provider resources.

Change-Id: Iab7bbe97f00eed841465dd27adbb0a3f24164f5d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2090419Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747680}

ios/public/provider/chrome/browser/build_config.gni

@@ -31,4 +31,12 @@ declare_args() {
   # file which is copied to the application bundle. This is used by Firebase
   # SDK (which comes from the internal framework).
   ios_firebase_resources_target = ""
+
+  # This defines targets to include resources needed by the providers which are
+  # copied to the application bundle.
+  ios_providers_resources_targets = []
+
+  # This defines targets to include resources needed by the providers which are
+  # copied to the test application bundle.
+  ios_providers_test_resources_targets = []
 }