Implement direction-specific touch-action values.

Implement direction-specific touch-action values.

Now that change https://codereview.chromium.org/1137483003/ has landed
fix up change (https://codereview.chromium.org/1131093002/) by removing
the #if 0 and static casts.

This change doesn't provide an implementation of touch-action
because it has previously landed. But it activates
the code paths because now pan-left/pan-right/pan-up/pan-down
are passed transformed correctly between the blink and content
APIs.

BUG=476556
TEST=content_unittests

Committed: https://crrev.com/f4c8e2abff40c85ff5ed0ff4baa1055e8c1dcf3e
Cr-Commit-Position: refs/heads/master@{#330525}

[dtapuska, 2015-05-12 15:28:37]

dtapuska@chromium.org changed reviewers:
+ jochen@chromium.org, rbyers@chromium.org

[dtapuska, 2015-05-12 15:28:37]

Sorry for the delay; the DEPS roller bot was pretty much stuck yesterday.

[Rick Byers, 2015-05-13 21:30:06]

LGTM
Please update the CL description/summary to make it clear that this CL is just
doing cleanup after the implementation of direction-specific touch-action values
(not landing the implementation itself).

[jochen (gone - plz use gerrit), 2015-05-19 10:55:31]

lgtm

[dtapuska, 2015-05-19 13:28:11]

The CQ bit was checked by dtapuska@chromium.org

[commit-bot: I haz the power, 2015-05-19 13:28:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1137153003/1

[commit-bot: I haz the power, 2015-05-19 16:59:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-19 17:01:53]

Patchset 1 (id:??) landed as
https://crrev.com/f4c8e2abff40c85ff5ed0ff4baa1055e8c1dcf3e
Cr-Commit-Position: refs/heads/master@{#330525}