Revert 230671 "Avoid creating two resizers for two-finger drag. ..."

Reverting because it seems to break the following test on Linux Chromium OS:
TabDragging/DetachToBrowserTabDragControllerTestTouch.DetachToOwnWindowTwoFingers/0
http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20(2)/builds/19110

> Avoid creating two resizers for two-finger drag. This CL is trying to avoid creating two separate WindowResizer instances that are now created in both ToplevelWindowEventHandler and TwoFingerDragHandler in the following scenario:
> [...]
> BUG=305730
> TEST=interactive_ui_tests --gtest_filter=*TabDragControllerTest*DetachToOwnWindowTwo*/1
> TEST=ash_unittests --gtest_filter=*SystemGestureEventFilterTest.TwoFingerDragDelayed*
> TEST=ash_unittests --gtest_filter=*SystemGestureEventFilterTest.ThreeFingerGestureStopsDrag*
> 
> Review URL: https://codereview.chromium.org/28043002

TBR=varkha@chromium.org

Review URL: https://codereview.chromium.org/39653002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230681 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230681
[Files.app] Fix typo in the navigation list.

BUG=none
TEST=none

Review URL: https://codereview.chromium.org/34513002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230682 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230682