Add functionality to window.history.go test page.

Add functionality to window.history.go test page.

- Added back/forward buttons.
- Added pushState() button.  This is necessary because if the pushState
  call is executed by injected JavaScript, then the navigation is
  registered as a client redirect.
- Display placeholder state object string when a popstate event with a
  null state object is received.

BUG=673022
Committed: https://crrev.com/97c65878672508dea30c898fab48c40d36491589
Cr-Commit-Position: refs/heads/master@{#439020}

[kkhorimoto, 2016-12-16 01:28:26]

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

[Eugene But (OOO till 7-30), 2016-12-16 01:45:56]

lgtm

[kkhorimoto, 2016-12-16 02:21:15]

The CQ bit was checked by kkhorimoto@chromium.org

[commit-bot: I haz the power, 2016-12-16 02:22:02]

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, 2016-12-16 04:18:48]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1481854875637160, "parent_rev":
"9c2e6af4837b7f639f581e081708a8fce38bdc50", "commit_rev":
"9b0d6b1f3b11b21fc651b6c37af44bd7713954cb"}

[commit-bot: I haz the power, 2016-12-16 04:19:30]

Description was changed from

==========
Add functionality to window.history.go test page.

- Added back/forward buttons.
- Added pushState() button.  This is necessary because if the pushState
  call is executed by injected JavaScript, then the navigation is
  registered as a client redirect.
- Display placeholder state object string when a popstate event with a
  null state object is received.

BUG=673022
==========

to

==========
Add functionality to window.history.go test page.

- Added back/forward buttons.
- Added pushState() button.  This is necessary because if the pushState
  call is executed by injected JavaScript, then the navigation is
  registered as a client redirect.
- Display placeholder state object string when a popstate event with a
  null state object is received.

BUG=673022

Review-Url: https://codereview.chromium.org/2583733002
==========

[commit-bot: I haz the power, 2016-12-16 04:19:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-16 04:22:15]

Description was changed from

==========
Add functionality to window.history.go test page.

- Added back/forward buttons.
- Added pushState() button.  This is necessary because if the pushState
  call is executed by injected JavaScript, then the navigation is
  registered as a client redirect.
- Display placeholder state object string when a popstate event with a
  null state object is received.

BUG=673022

Review-Url: https://codereview.chromium.org/2583733002
==========

to

==========
Add functionality to window.history.go test page.

- Added back/forward buttons.
- Added pushState() button.  This is necessary because if the pushState
  call is executed by injected JavaScript, then the navigation is
  registered as a client redirect.
- Display placeholder state object string when a popstate event with a
  null state object is received.

BUG=673022

Committed: https://crrev.com/97c65878672508dea30c898fab48c40d36491589
Cr-Commit-Position: refs/heads/master@{#439020}
==========

[commit-bot: I haz the power, 2016-12-16 04:22:15]

Patchset 1 (id:??) landed as
https://crrev.com/97c65878672508dea30c898fab48c40d36491589
Cr-Commit-Position: refs/heads/master@{#439020}