Push API: Validate storage before returning cached subscriptions

components/gcm_driver/instance_id/instance_id_impl.h

Index: components/gcm_driver/instance_id/instance_id_impl.h
diff --git a/components/gcm_driver/instance_id/instance_id_impl.h b/components/gcm_driver/instance_id/instance_id_impl.h
index fb0069d0aa5c1c4a4e0ef94fe958821754222691..f082ed973a7664cdb6b7a9653fa49425ea04986d 100644
--- a/components/gcm_driver/instance_id/instance_id_impl.h
+++ b/components/gcm_driver/instance_id/instance_id_impl.h
@@ -37,6 +37,10 @@ class InstanceIDImpl : public InstanceID {
                 const std::string& scope,
                 const std::map<std::string, std::string>& options,
                 const GetTokenCallback& callback) override;
+  void ValidateToken(const std::string& authorized_entity,
+                     const std::string& scope,
+                     const std::string& token,
+                     const ValidateTokenCallback& callback) override;
   void DeleteTokenImpl(const std::string& authorized_entity,
                        const std::string& scope,
                        const DeleteTokenCallback& callback) override;
@@ -62,6 +66,10 @@ class InstanceIDImpl : public InstanceID {
       const std::string& scope,
       const std::map<std::string, std::string>& options,
       const GetTokenCallback& callback);
+  void DoValidateToken(const std::string& authorized_entity,
+                       const std::string& scope,
+                       const std::string& token,
+                       const ValidateTokenCallback& callback);
   void DoDeleteToken(const std::string& authorized_entity,
                      const std::string& scope,
                      const DeleteTokenCallback& callback);