Handle floating point coordinates from ozone to exosphere

Handle floating point coordinates from ozone to exosphere

Most touch coordinate handling within chrome is done with gfx:Points.
Rounding to points works well for most cases, but really degrades
user experience for hand writing with an on-screen stylus.
This change will add variants to a couple of coordinate transformation
methods that will use gfx::PointF instead of gfx::Point.
This allows touch coordinates to be passed from ozone to exosphere in
sub-pixel accuracy, allowing those coordinates to be used in arc++
note taking apps.

BUG=681235
TEST=Test with arc++ drawing apps without smoothing. Lines should
be smooth without distinct steps.
NOPRESUBMIT=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2648583003
Cr-Commit-Position: refs/heads/master@{#445510}
(cherry picked from commit 951e1c2407a8055588e51f2f7768f034c32b3e06)

Review-Url: https://codereview.chromium.org/2654653002
Cr-Commit-Position: refs/branch-heads/2987@{#43}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/460a6b800eeacd57e0c61d144a919688522e7e6f

[denniskempin (chromium), 2017-01-23 22:33:50]

denniskempin@chromium.org changed reviewers:
+ skau@chromium.org

[skau, 2017-01-23 22:34:48]

The CQ bit was checked by skau@chromium.org

[skau, 2017-01-23 22:34:49]

lgtm

[commit-bot: I haz the power, 2017-01-23 22:35:20]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-23 22:36:56]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485210888734020, "parent_rev":
"4abc2fbc6aad0e4b49508d8b8a904f9a4b684b4f", "commit_rev":
"460a6b800eeacd57e0c61d144a919688522e7e6f"}

[commit-bot: I haz the power, 2017-01-23 22:37:27]

Description was changed from

==========
Handle floating point coordinates from ozone to exosphere

Most touch coordinate handling within chrome is done with gfx:Points.
Rounding to points works well for most cases, but really degrades
user experience for hand writing with an on-screen stylus.
This change will add variants to a couple of coordinate transformation
methods that will use gfx::PointF instead of gfx::Point.
This allows touch coordinates to be passed from ozone to exosphere in
sub-pixel accuracy, allowing those coordinates to be used in arc++
note taking apps.

BUG=681235
TEST=Test with arc++ drawing apps without smoothing. Lines should
be smooth without distinct steps.
NOPRESUBMIT=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2648583003
Cr-Commit-Position: refs/heads/master@{#445510}
(cherry picked from commit 951e1c2407a8055588e51f2f7768f034c32b3e06)
==========

to

==========
Handle floating point coordinates from ozone to exosphere

Most touch coordinate handling within chrome is done with gfx:Points.
Rounding to points works well for most cases, but really degrades
user experience for hand writing with an on-screen stylus.
This change will add variants to a couple of coordinate transformation
methods that will use gfx::PointF instead of gfx::Point.
This allows touch coordinates to be passed from ozone to exosphere in
sub-pixel accuracy, allowing those coordinates to be used in arc++
note taking apps.

BUG=681235
TEST=Test with arc++ drawing apps without smoothing. Lines should
be smooth without distinct steps.
NOPRESUBMIT=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2648583003
Cr-Commit-Position: refs/heads/master@{#445510}
(cherry picked from commit 951e1c2407a8055588e51f2f7768f034c32b3e06)

Review-Url: https://codereview.chromium.org/2654653002
Cr-Commit-Position: refs/branch-heads/2987@{#43}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/460a6b800eeacd57e0c61d144a91...
==========

[commit-bot: I haz the power, 2017-01-23 22:37:28]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/460a6b800eeacd57e0c61d144a91...