Cas Client repo update-2.

-Parse EMM in Cas plugin
-Entitlement key rotation support
-Multi_content_license support

plugin/include/ecm_parser_v3.h

@@ -49,6 +49,10 @@ class EcmParserV3 : public EcmParser {
   std::string ecm_serialized_payload() const override;
   std::string signature() const override;
 
+  bool is_entitlement_rotation_enabled() const override;
+  uint32_t entitlement_period_index() const override;
+  uint32_t entitlement_rotation_window_left() const override;
+
  private:
   // Constructs an EcmParserV3 using |ecm|.
   EcmParserV3(video_widevine::SignedEcmPayload signed_ecm_payload,