Initial import of Widevine Common Encryption DRM engine

Builds libwvmdrmengine.so, which is loaded by the new
MediaDrm APIs to support playback of Widevine/CENC
protected content.

Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c

libwvdrmengine/cdm/core/include/clock.h

@@ -0,0 +1,19 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Clock - Platform independent interface for a time library
+//
+#ifndef CDM_BASE_CLOCK_H_
+#define CDM_BASE_CLOCK_H_
+
+#include <stdint.h>
+
+namespace wvcdm {
+
+// Provides time related information. The implementation is platform dependent.
+
+// Provides the number of seconds since an epoch (00:00 hours, Jan 1, 1970 UTC)
+int64_t GetCurrentTime();
+
+};  // namespace wvcdm
+
+#endif  // CDM_BASE_CLOCK_H_