Fix testHistoryForwardNavigation.

Fix testHistoryForwardNavigation.

This CL first checks for webview sentinel text to be displayed before
checking the omnibox contents.  Since the web view text matcher executes
JavaScript on the page to search for the sentinel text, this prevents
the omnibox text check from occurring until the page has been loaded
and the script is executed.

BUG=677129
Review-Url: https://codereview.chromium.org/2635553003
Cr-Commit-Position: refs/heads/master@{#443738}
Committed: https://chromium.googlesource.com/chromium/src/+/6a288792818793041b5f5eb3e540c43f17f3b094

[kkhorimoto, 2017-01-13 23:43:03]

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

[Eugene But (OOO till 7-30), 2017-01-13 23:47:59]

lgtm

[kkhorimoto, 2017-01-13 23:50:46]

The CQ bit was checked by kkhorimoto@chromium.org

[commit-bot: I haz the power, 2017-01-13 23:51:19]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-14 00:10:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484351446990120, "parent_rev":
"aedd3c2c977646f2fd410c8a21a107b77e9df1b8", "commit_rev":
"6a288792818793041b5f5eb3e540c43f17f3b094"}

[commit-bot: I haz the power, 2017-01-14 00:11:32]

Description was changed from

==========
Fix testHistoryForwardNavigation.

This CL first checks for webview sentinel text to be displayed before
checking the omnibox contents.  Since the web view text matcher executes
JavaScript on the page to search for the sentinel text, this prevents
the omnibox text check from occurring until the page has been loaded
and the script is executed.

BUG=677129
==========

to

==========
Fix testHistoryForwardNavigation.

This CL first checks for webview sentinel text to be displayed before
checking the omnibox contents.  Since the web view text matcher executes
JavaScript on the page to search for the sentinel text, this prevents
the omnibox text check from occurring until the page has been loaded
and the script is executed.

BUG=677129

Review-Url: https://codereview.chromium.org/2635553003
Cr-Commit-Position: refs/heads/master@{#443738}
Committed:
https://chromium.googlesource.com/chromium/src/+/6a288792818793041b5f5eb3e540...
==========

[commit-bot: I haz the power, 2017-01-14 00:11:33]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/6a288792818793041b5f5eb3e540...