The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/74eff8d7daba3c907a07f44c231a7d07d8866a18

commit 74eff8d7daba3c907a07f44c231a7d07d8866a18
Author: nzolghadr <nzolghadr@chromium.org>
Date: Wed Aug 03 16:08:39 2016

Change mouse pointer event targets to the capturing node

This is the first step to change to hit-test node of the
mouse events to the captured node.
Note that this change doesn't remove the hit-testing itself.
So it doesn't improve the performance while a pointer is
captured. To be able to do that we need some refactoring to
be done first. See  crbug.com/625843 .

BUG= 629921 

Review-Url: https://codereview.chromium.org/2174863002
Cr-Commit-Position: refs/heads/master@{#409521}

[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/LayoutTests/TestExpectations
[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-capture-expected.txt
[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-capture-transition-events-expected.txt
[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/LayoutTests/fast/events/pointerevents/touch-capture-expected.txt
[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/Source/core/events/PointerEventFactory.h
[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/Source/core/input/EventHandler.cpp
[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/Source/core/input/PointerEventManager.cpp
[modify] https://crrev.com/74eff8d7daba3c907a07f44c231a7d07d8866a18/third_party/WebKit/Source/core/input/PointerEventManager.h