[OpenJDK 2D-Dev] JDK9: RFR: 8035487: Fix raw and unchecked lint warnings in javax.imageio.spi

[Henry Jen]

Hi,

Please review the webrev to clean up raw and unchecked warnings in 
javax.imageio.spi packag at,

http://cr.openjdk.java.net/~henryjen/jdk9/8035487/0/webrev/

Cheers,
Henry