Remove invalid check

Remove invalid check

Following https://codereview.chromium.org/2392283005,
WebContentsObserver::ReadyToCommitNavigation is called outside of
PlzNavigate. This CL removes a CHECK(IsBrowserSideNavigationEnabled())
in one of the functions called by an implementation of
ReadyToCommitNavigation, since we can now reach it when browser-side
navigation is not enabled.

BUG=658132
Review-Url: https://codereview.chromium.org/2504973002
Cr-Commit-Position: refs/heads/master@{#433591}
(cherry picked from commit 4c429f9b2a054e4d8b26e4a907c1f3c04ca730a1)

Committed: https://chromium.googlesource.com/chromium/src/+/bba81655761aeb01fbf3b17ea5283b894d40e1d2

[clamy, 2016-12-07 14:27:41]

Description was changed from

==========
Remove invalid check

Following https://codereview.chromium.org/2392283005,
WebContentsObserver::ReadyToCommitNavigation is called outside of
PlzNavigate. This CL removes a CHECK(IsBrowserSideNavigationEnabled())
in one of the functions called by an implementation of
ReadyToCommitNavigation, since we can now reach it when browser-side
navigation is not enabled.

BUG=658132

Review-Url: https://codereview.chromium.org/2504973002
Cr-Commit-Position: refs/heads/master@{#433591}
(cherry picked from commit 4c429f9b2a054e4d8b26e4a907c1f3c04ca730a1)
==========

to

==========
Remove invalid check

Following https://codereview.chromium.org/2392283005,
WebContentsObserver::ReadyToCommitNavigation is called outside of
PlzNavigate. This CL removes a CHECK(IsBrowserSideNavigationEnabled())
in one of the functions called by an implementation of
ReadyToCommitNavigation, since we can now reach it when browser-side
navigation is not enabled.

BUG=658132

Review-Url: https://codereview.chromium.org/2504973002
Cr-Commit-Position: refs/heads/master@{#433591}
(cherry picked from commit 4c429f9b2a054e4d8b26e4a907c1f3c04ca730a1)

Committed:
https://chromium.googlesource.com/chromium/src/+/bba81655761aeb01fbf3b17ea528...
==========

[clamy, 2016-12-07 14:27:43]

Committed patchset #1 (id:1) manually as
bba81655761aeb01fbf3b17ea5283b894d40e1d2.