[Payments] Implement ServiceWorkerPaymentInstrument::IsValidForModifier

Bug: 762668
Change-Id: I46f083b9bc6cf304a7d47b9ba974f2e49e85111e
Reviewed-on: https://chromium-review.googlesource.com/672668Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Commit-Queue: Ganggui Tang <gogerald@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502955}

components/payments/content/service_worker_payment_instrument.cc

@@ -4,6 +4,7 @@
 
 #include "components/payments/content/service_worker_payment_instrument.h"
 
+#include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/payment_app_provider.h"
@@ -141,7 +142,12 @@ bool ServiceWorkerPaymentInstrument::IsValidForModifier(
     const std::vector<std::string>& supported_networks,
     const std::set<autofill::CreditCard::CardType>& supported_types,
     bool supported_types_specified) const {
-  NOTIMPLEMENTED();
+  for (const auto& modifier_supported_method : method) {
+    if (base::ContainsValue(stored_payment_app_info_->enabled_methods,
+                            modifier_supported_method)) {
+      return true;
+    }
+  }
   return false;
 }