Don't try to dllexport InkDropAnimationControllerStub

Don't try to dllexport InkDropAnimationControllerStub

It's in an anonymous namespace, so it cannot be exported, and this causes
an error on the Win-Clang bots:

..\..\ui\views\animation\ink_drop_animation_controller_factory.cc(20,20) :
  error: 'views::(anonymous namespace)::InkDropAnimationControllerStub'
  must have external linkage when declared 'dllexport'

  class VIEWS_EXPORT InkDropAnimationControllerStub
                     ^

I'm pretty sure this class was never intended to be exported.

BUG=82385
TBR=bruthig,sadrul

Committed: https://crrev.com/2ca3862cb26d8708d31f82ca6c91399c328afa6b
Cr-Commit-Position: refs/heads/master@{#344511}

[hans, 2015-08-20 15:03:52]

The CQ bit was checked by hans@chromium.org

[commit-bot: I haz the power, 2015-08-20 15:04:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1302913002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1302913002/1

[bruthig, 2015-08-20 15:17:29]

On 2015/08/20 15:04:23, commit-bot: I haz the power wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1302913002/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1302913002/1

lgtm

[commit-bot: I haz the power, 2015-08-20 16:14:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-20 16:15:11]

Patchset 1 (id:??) landed as
https://crrev.com/2ca3862cb26d8708d31f82ca6c91399c328afa6b
Cr-Commit-Position: refs/heads/master@{#344511}