pan/tilt position could be negative (See the Sony EV1-HD1 camera technical manual).
commit65dc2c7b6b2ca712b8894f8096276eb09e1465ef
authorxdai <xdai@chromium.org>
Wed, 16 Sep 2015 00:41:32 +0000 (15 17:41 -0700)
committerCommit bot <commit-bot@chromium.org>
Wed, 16 Sep 2015 00:42:23 +0000 (16 00:42 +0000)
treef2ecf11c28679bb09d6d52ca35ae3533ad06ea2c
parent3ec7ab61e95a1484303acda60ba8497741a34bce
pan/tilt position could be negative (See the Sony EV1-HD1 camera technical manual).
But the pan/tilt position values returned by chrome.webcamPrivate.get(webcamId, ...) function
are all positive numbers, which is incorrect.

BUG=None

Review URL: https://codereview.chromium.org/1333683002

Cr-Commit-Position: refs/heads/master@{#349050}
extensions/browser/api/webcam_private/visca_webcam.cc