Revert of Selectively disable rubber banding on mac (part 2). (https://codereview.chromium.org/219473003/)

Reason for revert:
This CL causes regressions in vertical content scrolling.

https://code.google.com/p/chromium/issues/detail?id=365034

Original issue's description:
> Selectively disable rubber banding on mac (part 2).
> 
> The logic for handling 2-finger swipes should be:
> 1. If a 2-finger swipe can scroll the content (or iframe), it should do so.
> 2. If the 2-finger swipe can cause history navigation, it should do so.
> 3. The 2-finger swipe should rubber-band the content view.
> 
> (2) is handled by the embedder, and (1 & 3) by the renderer. Right now, the
> renderer is passed an IPC, and it tries to do (1), and then it tries to do (3).
> I've modified the event passed in so that there are flags that prevent the
> renderer from performing (3) under specific circumstances.
> 
> There was an existing mechanism to determine whether the renderer should try
> (3), but it was fragile, incorrectly used, and insufficient for newer features
> in chrome - the user can cancel a history swipe without cancelling the gesture,
> at which point rubber-banding should be possible again. I've simplified and
> fixed the logic inside ScrollElasticityController.mm to reflect the desired
> behavior.
> 
> This is part 2 of a two-part change. It includes the changes to
> ScrollElasticityController to use the new parameters on the WheelEvent. It also
> removes references to the old 2 parameter constructor for platformWheelEvent,
> in favor of the 4 parameter constructor.
> 
> BUG=321437
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170989

TBR=asvitkine@chromium.org,thakis@chromium.org
BUG=321437

Review URL: https://codereview.chromium.org/258413002

git-svn-id: svn://svn.chromium.org/blink/trunk@172429 bbb929c8-8fbe-4397-9dbb-9b2b20218538