Revert of Explicitly suppress scrolling for wheel events that will trigger zooming

Revert of Explicitly suppress scrolling for wheel events that will trigger zooming (patchset #10 id:360001 of https://codereview.chromium.org/739013008/)

Reason for revert:
Broke layout tests that use wheel events:
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20XP/builds/15918

Original issue's description:
> Explicitly suppress scrolling for wheel events that will trigger zooming
>
> We added a flag in Blink to decide if Ctrl-wheel-scroll should scroll or zoom, and now we use this flag in chromium code.
>
> This patch is part of a series:
>
> patch #1: https://codereview.chromium.org/759073002
> patch #2: This CL
> patch #3: https://codereview.chromium.org/768443002
>
> BUG=397027, 378755
>
> Committed: https://crrev.com/b3361bcdd3766a67c702c19781154c895fee75ca
> Cr-Commit-Position: refs/heads/master@{#309472}

TBR=rbyers@chromium.org,tdresser@chromium.org,jdduke@chromium.org,sievers@chromium.org,lanwei@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=397027, 378755
Committed: https://crrev.com/f3990fd7b7dad87b1b8c9b9f3dba97f64d06051b
Cr-Commit-Position: refs/heads/master@{#309531}

[Yuta Kitamura, 2014-12-23 03:51:17]

Created Revert of Explicitly suppress scrolling for wheel events that will
trigger zooming

[commit-bot: I haz the power, 2014-12-23 03:52:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/819993002/1

[commit-bot: I haz the power, 2014-12-23 03:53:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-23 03:53:59]

Patchset 1 (id:??) landed as
https://crrev.com/f3990fd7b7dad87b1b8c9b9f3dba97f64d06051b
Cr-Commit-Position: refs/heads/master@{#309531}