Notify the renderer if a history navigation has no subframe items.

Notify the renderer if a history navigation has no subframe items.

In this case, the renderer does not need to consult the browser
process if subframes are created during the navigation.  Since there
are no history items for it, the renderer can just load the default
URL.

BUG=638088, 639842
TEST=Restore chrome://settings after disabling MD settings mode.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2316003002
Cr-Commit-Position: refs/heads/master@{#420486}
(cherry picked from commit 45b3bba45f5c1276726541db2f6f8ca6c5e05b65)

Committed: https://chromium.googlesource.com/chromium/src/+/bd0bc90fb57c339a8890c38ad1d2612009b2d5e9

[Charlie Reis, 2016-09-30 22:24:20]

creis@chromium.org changed reviewers:
+ alexmos@chromium.org, nasko@chromium.org

[Charlie Reis, 2016-09-30 22:24:20]

Trying the merge to M54 again, after compiling and testing locally.

[Charlie Reis, 2016-09-30 22:29:51]

Description was changed from

==========
Notify the renderer if a history navigation has no subframe items.

In this case, the renderer does not need to consult the browser
process if subframes are created during the navigation.  Since there
are no history items for it, the renderer can just load the default
URL.

BUG=638088, 639842
TEST=Restore chrome://settings after disabling MD settings mode.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2316003002
Cr-Commit-Position: refs/heads/master@{#420486}
(cherry picked from commit 45b3bba45f5c1276726541db2f6f8ca6c5e05b65)
==========

to

==========
Notify the renderer if a history navigation has no subframe items.

In this case, the renderer does not need to consult the browser
process if subframes are created during the navigation.  Since there
are no history items for it, the renderer can just load the default
URL.

BUG=638088, 639842
TEST=Restore chrome://settings after disabling MD settings mode.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2316003002
Cr-Commit-Position: refs/heads/master@{#420486}
(cherry picked from commit 45b3bba45f5c1276726541db2f6f8ca6c5e05b65)

Committed:
https://chromium.googlesource.com/chromium/src/+/bd0bc90fb57c339a8890c38ad1d2...
==========

[Charlie Reis, 2016-09-30 22:29:53]

Committed patchset #1 (id:1) manually as
bd0bc90fb57c339a8890c38ad1d2612009b2d5e9.