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services/url_response_disk_cache/url_response_disk_cache_delegate.h

Index: services/url_response_disk_cache/url_response_disk_cache_delegate.h
diff --git a/services/url_response_disk_cache/url_response_disk_cache_delegate.h b/services/url_response_disk_cache/url_response_disk_cache_delegate.h
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+// 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_DELEGATE_H_
+#define SERVICES_URL_RESPONSE_DISK_CACHE_URL_RESPONSE_DISK_CACHE_DELEGATE_H_
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+#include "base/task_runner.h"
+
+namespace mojo {
+
+// This class allows to customized the behavior of the |URLResponseDiskCache|
+// implementation.
+class URLResponseDiskCacheDelegate {
+ public:
+  URLResponseDiskCacheDelegate() {}
+  virtual ~URLResponseDiskCacheDelegate() {}
+
+  // Allows to prefill the cache with content. This method will be called by the
+  // cache when an item that has never been in the cache is requested.
+  // |task_runner| is a task runner that can be used to do I/O. |url| is the url
+  // of the entry. |target| is a path where the content must be copied to if it
+  // exists. |callback| must be called with |true| if the delegate can retrieve
+  // an initial content for |url| after having push the content to |target|,
+  // otherwise, |callback| must be called with |false|. |callback| can be called
+  // before this method returns.
+  virtual void GetInitialPath(scoped_refptr<base::TaskRunner> task_runner,
+                              const std::string& url,
+                              const base::FilePath& target,
+                              const base::Callback<void(bool)>& callback) = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(URLResponseDiskCacheDelegate);
+};
+
+}  // namespace mojo
+
+#endif  // SERVICES_URL_RESPONSE_DISK_CACHE_URL_RESPONSE_DISK_CACHE_DELEGATE_H_