be9b7b6881
Pitfalls: * Left shift of signed integer has undefined behavior * Right-shift of signed integer has platform-specific behavior is value is negative * Cast from unsigned to signed has undefined behavior if value is negative BUG=webrtc:4824 Review URL: https://codereview.webrtc.org/1226993003 Cr-Commit-Position: refs/heads/master@{#9854}