Revert of Reduce hit test on ShowPress by moving event targeting to WebViewImpl

Revert of Reduce hit test on ShowPress by moving event targeting to WebViewImpl (patchset #11 id:240001 of https://codereview.chromium.org/490783003/)

Reason for revert:
Failing ContentShellTest on blink roll.

http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tests_recipe/builds/10536/

Original issue's description:
> Reduce hit test on ShowPress by moving hit testing to WebViewImpl.
> 
> Previously there was a hit test for link highlighting in WebViewImpl and then a                                          
> separate one in EventHandler::handleGestureEvent. This CL makes it so that a                                             
> single hit test in WebViewImpl is reused by the EventHandler. Scroll events                                              
> still need to hit test in a separate fashion though and their handling has been                                          
> refactored into a separate code path.
> 
> BUG=381728
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182281

TBR=aelias@chromium.org,dgozman@chromium.org,rbyers@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=381728
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182340

[Zeeshan Qureshi, 2014-09-19 16:32:36]

Created Revert of Reduce hit test on ShowPress by moving event targeting to
WebViewImpl

[commit-bot: I haz the power, 2014-09-19 16:33:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/587543004/1

[commit-bot: I haz the power, 2014-09-19 16:33:49]

Committed patchset #1 (id:1) as 182340