[Payments] Cache payment manifests.

chrome/browser/web_data_service_factory.h

Index: chrome/browser/web_data_service_factory.h
diff --git a/chrome/browser/web_data_service_factory.h b/chrome/browser/web_data_service_factory.h
index 9ab056302a46da4b5df570a8a24192104c4f4e76..c2a4a8a6f865d7edc68497a0dffac23e6fc57b22 100644
--- a/chrome/browser/web_data_service_factory.h
+++ b/chrome/browser/web_data_service_factory.h
@@ -24,6 +24,12 @@ class WebDataServiceWrapper;
 class PasswordWebDataService;
 #endif
 
+#if defined(OS_ANDROID)
+namespace payments {
+class PaymentManifestWebDataService;
+}
+#endif
+
 namespace autofill {
 class AutofillWebDataService;
 }
@@ -61,6 +67,12 @@ class WebDataServiceFactory : public BrowserContextKeyedServiceFactory {
       ServiceAccessType access_type);
 #endif
 
+#if defined(OS_ANDROID)
+  static scoped_refptr<payments::PaymentManifestWebDataService>
+  GetPaymentManifestWebDataForProfile(Profile* profile,
+                                      ServiceAccessType access_type);
+#endif
+
   static WebDataServiceFactory* GetInstance();
 
  private: