Makes event dispatch implicitly target specific window until release

Makes event dispatch implicitly target specific window until release

We were doing this before for mouse events, but not touch events. Now
the two have the same logic.

Also makes event dispatch deal correctly with window being
destroyed/visibility-changing or hiearchy changing during dispatch.

BUG=none
TEST=none
R=ben@chromium.org

Committed: https://crrev.com/5c7cb81a4182a6c3166aead6e529ec28a3d817f9
Cr-Commit-Position: refs/heads/master@{#356846}

[Ben Goodger (Google), 2015-10-29 00:34:16]

ben@chromium.org changed reviewers:
+ sadrul@chromium.org

[sadrul, 2015-10-29 00:48:25]

lgtm

https://codereview.chromium.org/1425123002/diff/20001/components/mus/ws/event...
File components/mus/ws/event_dispatcher.cc (right):

https://codereview.chromium.org/1425123002/diff/20001/components/mus/ws/event...
components/mus/ws/event_dispatcher.cc:286: bool
EventDispatcher::IsSendingPointerEventsToTarget(ServerWindow* window) {
Would IsObservingWindow() better explain what this is doing/used for?

[sky, 2015-10-29 14:54:16]

https://codereview.chromium.org/1425123002/diff/20001/components/mus/ws/event...
File components/mus/ws/event_dispatcher.cc (right):

https://codereview.chromium.org/1425123002/diff/20001/components/mus/ws/event...
components/mus/ws/event_dispatcher.cc:286: bool
EventDispatcher::IsSendingPointerEventsToTarget(ServerWindow* window) {
On 2015/10/29 00:48:25, sadrul wrote:
> Would IsObservingWindow() better explain what this is doing/used for?

Done.

[sky, 2015-10-29 15:04:45]

The CQ bit was checked by sky@chromium.org

[sky, 2015-10-29 15:04:45]

The patchset sent to the CQ was uploaded after l-g-t-m from sadrul@chromium.org
Link to the patchset: https://codereview.chromium.org/1425123002/#ps60001
(title: "merge 2 trunk")

[commit-bot: I haz the power, 2015-10-29 15:05:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1425123002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1425123002/60001

[commit-bot: I haz the power, 2015-10-29 15:19:30]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-10-29 15:20:56]

Patchset 4 (id:??) landed as
https://crrev.com/5c7cb81a4182a6c3166aead6e529ec28a3d817f9
Cr-Commit-Position: refs/heads/master@{#356846}