Implement Networking Private API VerifyAndEncryptCredentials method

chrome/browser/extensions/api/networking_private/networking_private_apitest.cc

Index: chrome/browser/extensions/api/networking_private/networking_private_apitest.cc
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_apitest.cc b/chrome/browser/extensions/api/networking_private/networking_private_apitest.cc
index 45c309a5a8cc7eab03c031b56b6093b7a8e8c6b4..92cfe2de04eb541a5a1c97dae0d7db32c02d55d1 100644
--- a/chrome/browser/extensions/api/networking_private/networking_private_apitest.cc
+++ b/chrome/browser/extensions/api/networking_private/networking_private_apitest.cc
@@ -30,6 +30,7 @@
 #include "policy/policy_constants.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 #else  // !defined(OS_CHROMEOS)
+#include "chrome/browser/extensions/api/networking_private/networking_private_credentials_getter.h"
 #include "chrome/browser/extensions/api/networking_private/networking_private_service_client.h"
 #include "chrome/browser/extensions/api/networking_private/networking_private_service_client_factory.h"
 #include "components/wifi/wifi_service.h"
@@ -70,6 +71,13 @@ class CryptoVerifyStub
     *verified = true;
   }
 
+  virtual void VerifyAndEncryptCredentials(
+      scoped_ptr<base::ListValue> args,
+      const extensions::NetworkingPrivateServiceClient::CryptoVerify::
+          VerifyAndEncryptCredentialsCallback& callback) OVERRIDE {
+    callback.Run("encrypted_credentials", "");
+  }
+
   virtual void VerifyAndEncryptData(scoped_ptr<base::ListValue> args,
                                     std::string* encoded_data,
                                     std::string* error) OVERRIDE {