1. Added WEBRTC_FUCHSIA define. 2. Added PlatformThreadId typedef for Fuchsia. 3. Updated ifdefs for _strnicmp()/strncasecmd(), so _strnicmp() is used on all platforms 3. Updated ifdefs in clock.cc to avoid invalid assumption that POSIX = LINUX || MAC . Bug: chromium:750940 Change-Id: Id7aa98e017f467bcebb78a0b298ba91655502072 Reviewed-on: https://webrtc-review.googlesource.com/31641 Commit-Queue: Sergey Ulanov <sergeyu@chromium.org> Reviewed-by: Tommi <tommi@webrtc.org> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21233}