Fix NTP not to slide with mouse

Fix NTP not to slide with mouse

Fix TouchHandler to only respond to mouse events when explicitly requested.  By
default it should respond only to touch events.  As additional insurance (to
return the runtime behavior to exactly how it was before my change since we're
about to branch for M17), don't enable the use of TouchHandler unless we're
running with --touch-optimized-ui.

Also clean up a few touch NTP related things:
 - Remove unused copy of ToucHandler (probably legacy from previous login work) and reference to Grabber (which already doesn't exist in the tree).
 - Remove stale ntp4 script for running closure/lint.

BUG=106012
TEST=Manual - try dragging ntp page with the mouse, shouldn't move


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=112568

[Rick Byers, 2011-12-01 20:21:31]

Hey Evan,
Can you review this small NTP change please?

Thanks,
   Rick

[Evan Stade, 2011-12-01 21:46:15]

lgtm

[commit-bot: I haz the power, 2011-12-01 21:49:22]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rbyers@chromium.org/8775024/2001

[commit-bot: I haz the power, 2011-12-01 23:09:58]

Change committed as 112568