Revert of mac: History swiping doesn't work right with iframes. (https://codereview.chromium.org/194713016/)

Reason for revert:
This CL does not play nicely with rubber banding with blink on mac.
See https://code.google.com/p/chromium/issues/detail?id=321437 for more details.

Original issue's description:
> mac: History swiping doesn't work right with iframes.
> 
> In the previous behavior, it was possible for a user to start scrolling an
> iframe with the touch pad, and then trigger history navigation. This happened
> because the Cocoa view only received callbacks for whether an event in a
> gesture wasn't handled. If any event in a gesture happened to not be handled by
> blink, then that event could trigger history swiping, even though blink may
> have handled earlier events in the same gesture!
> 
> My solution is to propagate the information for whether an event was handled to
> the Cocoa view. History swiping is only enabled if no event is ever handled by
> blink.
> 
> BUG=321437
> TEST=Navigate to www.google.com. Then navigate to
> http://codepen.io/anon/pen/ujsec. Place the cursor in the box that says "place
> cursor here", and start a downwards 2-finger swipe. Half way through the swipe,
> change directions and swipe to the left (or right, depending on your settings)
> to navigate backwards in history. Prior to this change, the history swipe arrow
> would appear. In this change, the history swipe arrow no longer appears.
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=256929

TBR=thakis@chromium.org,asvitkine@chromium.org,joi@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=321437

Review URL: https://codereview.chromium.org/196653013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256969 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256969