Move MediaDrmBridge provision communication to native side.

media/base/provision_fetcher.h

Index: media/base/provision_fetcher.h
diff --git a/media/base/provision_fetcher.h b/media/base/provision_fetcher.h
new file mode 100644
index 0000000000000000000000000000000000000000..3f1e796300139d845e62387c952d2a4ca9c23948
--- /dev/null
+++ b/media/base/provision_fetcher.h
@@ -0,0 +1,39 @@
+// 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>

[xhwang, 2015/11/06 23:08:19]

style nit: one empty line here

[Tima Vaisburd, 2015/11/11 03:03:34]

Done.

+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"

[xhwang, 2015/11/06 23:08:19]

not used?

[Tima Vaisburd, 2015/11/11 03:03:34]

Removed

+#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 |cb| callback with the response. The input parameters
+  // |default_url| and |request_data| corresponds to Java class
+  // MediaDrm.ProvisionRequest.
+  // The implementation must call |cb| on the same thread that this method

[xhwang, 2015/11/06 23:08:19]

nit: s/cb/response_cb

Also, the callback should be called asynchronously.

[Tima Vaisburd, 2015/11/11 03:03:34]

Done.

+  // is called.
+  virtual void Retrieve(const std::string& default_url,
+                        const std::string& request_data,
+                        const ResponseCB& response_cb) = 0;
+};

[xhwang, 2015/11/06 23:08:19]

DISALLOW_COPY_AND_ASSIGN

[Tima Vaisburd, 2015/11/11 03:03:34]

Why do we need to require this here?

[xhwang, 2015/11/11 09:53:21]

Acknowledged.

+
+}  // namespace media
+
+#endif  // MEDIA_BASE_PROVISION_FETCHER_H