Add invalidation to url_response_disk_cache.

services/url_response_disk_cache/url_response_disk_cache_impl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SERVICES_URL_RESPONSE_DISK_CACHE_URL_RESPONSE_DISK_CACHE_IMPL_H_
 #define SERVICES_URL_RESPONSE_DISK_CACHE_URL_RESPONSE_DISK_CACHE_IMPL_H_
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 20 matching lines @@
   URLResponseDiskCacheImpl(scoped_refptr<base::TaskRunner> task_runner,
                            scoped_refptr<URLResponseDiskCacheDB> db,
                            const std::string& remote_application_url,
                            InterfaceRequest<URLResponseDiskCache> request);
   ~URLResponseDiskCacheImpl() override;
 
  private:
   // URLResponseDiskCache
   void Get(const String& url, const GetCallback& callback) override;
   void Update(URLResponsePtr response) override;
+  void Validate(const String& url) override;
   void UpdateAndGet(URLResponsePtr response,
                     const UpdateAndGetCallback& callback) override;
   void UpdateAndGetExtracted(
       URLResponsePtr response,
       const UpdateAndGetExtractedCallback& callback) override;
 
   // Internal implementation of |UpdateAndGet| using a pair of base::FilePath to
   // represent the paths the the response body and to the per-response client
   // cache directory.
   void UpdateAndGetInternal(URLResponsePtr response,
@@ skipping 14 matching lines @@
   std::string request_origin_;
   scoped_refptr<URLResponseDiskCacheDB> db_;
   StrongBinding<URLResponseDiskCache> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(URLResponseDiskCacheImpl);
 };
 
 }  // namespace mojo
 
 #endif  // SERVICES_URL_RESPONSE_DISK_CACHE_URL_RESPONSE_DISK_CACHE_IMPL_H_