This is a merge from the widevine repo of http://go/wvgerrit/14262
This CL replaces AES with a psuedorandom number generator to encrypt
the needles in the oemcyrpto level 3 haystack. This speeds up the
overhead significantly, and reduces decrypt times by as much as 75%
for small buffers (1-3 kb). This makes the obfuscation slightly less
secure but is worth the overall performance boost.
Level 3 library versions:
level3/arm/libwvlevel3.a Level3 Library May 1 2015 15:45:12
level3/x86/libwvlevel3.a Level3 Library May 1 2015 15:45:55
b/19582757 L3 Widevine extremely choppy on Nexus 6 (480p)
Change-Id: I3077c04047a7f2da6f64869d7a9af5ddcc62671f
dfb1c39275