Add range checks in a variety of places where the values will subsequently be expected to be 0-127.
Add range checks in a variety of places where the values will subsequently be
expected to be 0-127.

BUG=none
TEST=none
R=juberti@webrtc.org
TBR=henrika

Review URL: https://webrtc-codereview.appspot.com/37759004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8399}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: e9facf8bb32a1688f2156009c755caa2904e1ac9

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