Draw outer frame per dimension ratio of touch device

Previously, webplot draws the outer rectangle frame on the canvas
as large as possible. In this patch, it draws the outer frame
conforming to the dimension ratio of the touch device just like
what the old mtplot did.

BUG=chromium:443539
TEST=Manually test that webplot draws a gray outer rectangle on
the canvas with the same dimension ratio of the device.

Change-Id: Ie7dad244402f20262a9fec84b503b75422336f06
Reviewed-on: https://chromium-review.googlesource.com/239452
Reviewed-by: Charlie Mooney <charliemooney@chromium.org>
Trybot-Ready: Shyh-In Hwang <josephsih@chromium.org>
Tested-by: Shyh-In Hwang <josephsih@chromium.org>
Commit-Queue: Shyh-In Hwang <josephsih@chromium.org>
1 file changed
tree: 41f7275864fd4334479a32a214be6fd3466d4922
  1. remote/
  2. webplot
  3. webplot.html
  4. webplot.js
  5. webplot.py