media: Use platform specific folders for CDMs

media/cdm/cdm_paths.h

Index: media/cdm/cdm_paths.h
diff --git a/media/cdm/cdm_paths.h b/media/cdm/cdm_paths.h
new file mode 100644
index 0000000000000000000000000000000000000000..c206c3e30a3503c89756b08e8ff2cba025787589
--- /dev/null
+++ b/media/cdm/cdm_paths.h
@@ -0,0 +1,24 @@
+// Copyright 2016 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_CDM_CDM_PATHS_H_
+#define MEDIA_CDM_CDM_PATHS_H_
+
+#include <string>
+
+#include "base/files/file_path.h"
+
+namespace media {
+
+// Returns the relative path of a component CDM. On platforms where a platform

[ddorwin, 2016/05/20 04:08:56]

Drop "component" from the first sentence.

Perhaps also reword to "Returns the path of the |cdm_base_path| CDM relative to
<modules dir?>."

[xhwang, 2016/05/20 07:18:19]

Done, though DIR_COMPONENTS is really a "chrome" concept.

+// specific path is used, returns
+//   |cdm_base_path|/_platform_specific/<platform>_<arch>
+//   e.g. WidevineCdm/_platform_specific/win_x64
+// Otherwise, returns an empty path.
+// TODO(xhwang): Use this function in Widevine CDM component installer.
+base::FilePath GetPlatformSpecificDirectory(const std::string& cdm_base_path);
+
+}  // namespace media
+
+#endif  // MEDIA_CDM_CDM_PATHS_H_