Move MediaDrmBridge provision communication to native side.

media/base/android/provision_fetcher.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 MEDIA_BASE_PROVISION_FETCHER_H
+#define MEDIA_BASE_PROVISION_FETCHER_H
+
+#include <string>
+
+#include "base/callback.h"
+#include "media/base/media_export.h"
+
+namespace media {
+
+// The interface to retrieve provision information for MediaDrmBridge.
+class MEDIA_EXPORT ProvisionFetcher {
+ public:
+  // After provision information is retrieved this callback will be called
+  // with the status flag (success/failure) and the provision response in
+  // case of success.
+  using ResponseCB =
+      base::Callback<void(bool success, const std::string& response)>;
+
+  virtual ~ProvisionFetcher() {}
+
+  // Requests the provision information with |default_url| and |request_data|
+  // and calls |response_cb| callback with the response. The input parameters
+  // |default_url| and |request_data| corresponds to Java class
+  // MediaDrm.ProvisionRequest.
+  // The implementation must call |response_cb| asynchronously on the same
+  // thread that this method is called.
+  virtual void Retrieve(const std::string& default_url,
+                        const std::string& request_data,
+                        const ResponseCB& response_cb) = 0;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_PROVISION_FETCHER_H