Ignore title changes from WKWebView when the web process dies

Ignore title changes from WKWebView when the web process dies

WKWebView sets the title to blank when the web process dies; ignore that
update so that the navigation item won't end up with a blank title.

BUG=558178
Committed: https://crrev.com/8915d5073ac9a5f3e5116f1cb1d496afb7293518
Cr-Commit-Position: refs/heads/master@{#361214}

[stuartmorgan, 2015-11-20 23:22:58]

stuartmorgan@chromium.org changed reviewers:
+ eugenebut@chromium.org

[Eugene But (OOO till 7-30), 2015-11-20 23:24:40]

lgtm

https://codereview.chromium.org/1461413004/diff/1/ios/web/web_state/ui/crw_wk...
File ios/web/web_state/ui/crw_wk_web_view_web_controller.mm (right):

https://codereview.chromium.org/1461413004/diff/1/ios/web/web_state/ui/crw_wk...
ios/web/web_state/ui/crw_wk_web_view_web_controller.mm:1488:
DCHECK(self.title.length == 0);
Optional NIT: DCHECK_EQ

[stuartmorgan, 2015-11-23 22:45:07]

https://codereview.chromium.org/1461413004/diff/1/ios/web/web_state/ui/crw_wk...
File ios/web/web_state/ui/crw_wk_web_view_web_controller.mm (right):

https://codereview.chromium.org/1461413004/diff/1/ios/web/web_state/ui/crw_wk...
ios/web/web_state/ui/crw_wk_web_view_web_controller.mm:1488:
DCHECK(self.title.length == 0);
On 2015/11/20 23:24:40, eugenebut wrote:
> Optional NIT: DCHECK_EQ

Done.

[stuartmorgan, 2015-11-23 22:45:11]

The CQ bit was checked by stuartmorgan@chromium.org

[stuartmorgan, 2015-11-23 22:45:12]

The patchset sent to the CQ was uploaded after l-g-t-m from
eugenebut@chromium.org
Link to the patchset: https://codereview.chromium.org/1461413004/#ps20001
(title: "DCHECK_EQ")

[commit-bot: I haz the power, 2015-11-23 22:46:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1461413004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1461413004/20001

[commit-bot: I haz the power, 2015-11-23 23:19:48]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-23 23:20:33]

Patchset 2 (id:??) landed as
https://crrev.com/8915d5073ac9a5f3e5116f1cb1d496afb7293518
Cr-Commit-Position: refs/heads/master@{#361214}