Revert of Fix a crash when views::HWNDMessageHandler::HandleTouchMessage

Revert of Fix a crash when views::HWNDMessageHandler::HandleTouchMessage (patchset #3 id:80001 of https://codereview.chromium.org/1147583002/)

Reason for revert:
We reverted the CL which needs to be fixed by this one, so we need to revert it one as well. We will recommit it once we fully fix and test it.

Original issue's description:
> Fix a crash when views::HWNDMessageHandler::HandleTouchMessage.
>
> There is a crash when calling views::HWNDMessageHandler::HandleTouchMessage,
> because there are missing touch presses. Remove the CHECK for missing touch press,
> and ignore when this happens.
>
> BUG=316085, 488473
>
> Committed: https://crrev.com/41065dad044cd3bbd3c9bcc24e59eeae27a6c6a9
> Cr-Commit-Position: refs/heads/master@{#330751}

TBR=sadrul@chromium.org,ananta@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=316085, 488473
Committed: https://crrev.com/187b7d3b38f2a439b1a10d389d5a52f3460777a2
Cr-Commit-Position: refs/heads/master@{#330757}

[lanwei, 2015-05-20 17:19:02]

Created Revert of Fix a crash when views::HWNDMessageHandler::HandleTouchMessage

[commit-bot: I haz the power, 2015-05-20 17:19:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1148143002/1

[commit-bot: I haz the power, 2015-05-20 17:20:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-20 17:21:07]

Patchset 1 (id:??) landed as
https://crrev.com/187b7d3b38f2a439b1a10d389d5a52f3460777a2
Cr-Commit-Position: refs/heads/master@{#330757}