Replace old logging mechanism in webrtc/modules/video_capture/linux

This replaces the WEBRTC_TRACE macros with LOG-macros.

Patchset 1: Run a formatting script, found in issue webrtc:5118.

Patchset 2: Apply manual fixes.
 - Fix cases and formatting not handled by the script
 - Replace a bit-shift / casting circus with utility function
   in video_capture_linux.cc

Bug: webrtc:5118
Change-Id: Ib49c1c4d2502834b9d655dafa7c34bc47f1d73d9
Reviewed-on: https://chromium-review.googlesource.com/603709
Commit-Queue: Sam Zackrisson <saza@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Cr-Original-Commit-Position: refs/heads/master@{#19371}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 2ed6e4f0226cc911588478544350e9c4d66498a9
3 files changed