Revert of Swipe Gestures for Accessibility

Revert of Swipe Gestures for Accessibility (https://codereview.chromium.org/330763007/)

Reason for revert:
TouchExplorationTest.GestureSwipe is failing on "Linux Chromium OS ASan LSan Tests (3)"
http://build.chromium.org/p/chromium.memory/builders/Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%283%29/builds/2159

Original issue's description:
> Swipe Gestures for Accessibility
> 
> Register that gestures have been received by the touch_exploration_controller in Accessibility Mode.
> 
> Swipe gestures are registered when the user begins a swipe and completes it before the time out period. If a swipe is successfully completed, the keyboard shortcut <shift>+<search>+direction will called. 
> 
> If the grace period has elapsed, then the mode changes to touch exploration. If an additional finger has been added before the grace period has elapsed, then the mode changes to passthrough.
> 
> BUG=387304
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281614
TBR=lisayin@chromium.org,dmazzoni@chromium.org,tdresser@chromium.org,evy@chromium.org,aboxhall@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=387304
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281656

[hashimoto, 2014-07-08 03:59:06]

Created Revert of Swipe Gestures for Accessibility

[commit-bot: I haz the power, 2014-07-08 04:04:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/hashimoto@chromium.org/372173002/1

[commit-bot: I haz the power, 2014-07-08 04:04:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-08 04:04:06]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[hashimoto, 2014-07-08 04:05:43]

The CQ bit was checked by hashimoto@chromium.org

[commit-bot: I haz the power, 2014-07-08 04:06:27]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/hashimoto@chromium.org/372173002/1

[commit-bot: I haz the power, 2014-07-08 04:12:54]

Change committed as 281656