Add a fragment change exception to history API's unique origin restrictions.

Add a fragment change exception to history API's unique origin restrictions.

Things like jQuery Mobile and Apple's Keynote use hash changes via
'replaceState' for routing. Treating 'file:' URLs as unique breaks them.
We can fairly safely carve out an exception for changes that only effect
the URL's fragment identifier ('#...'), and doing so will prevent breakage.

BUG=528681
R=jochen@chromium.org

Committed: https://crrev.com/f5cdfde9135883c6cd83c81436ebe4888c432b8b
Cr-Commit-Position: refs/heads/master@{#371238}

[Mike West, 2016-01-25 09:44:09]

Mind taking a look, Jochen?

[jochen (gone - plz use gerrit), 2016-01-25 09:46:01]

lgtm

[Mike West, 2016-01-25 12:54:03]

The CQ bit was checked by mkwst@chromium.org

[Mike West, 2016-01-25 12:54:03]

The patchset sent to the CQ was uploaded after l-g-t-m from jochen@chromium.org
Link to the patchset: https://codereview.chromium.org/1632513002/#ps20001
(title: "Test.")

[commit-bot: I haz the power, 2016-01-25 12:54:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1632513002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1632513002/20001

[commit-bot: I haz the power, 2016-01-25 14:30:53]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-01-25 14:32:03]

Description was changed from

==========
Add a fragment change exception to history API's unique origin restrictions.

Things like jQuery Mobile and Apple's Keynote use hash changes via
'replaceState' for routing. Treating 'file:' URLs as unique breaks them.
We can fairly safely carve out an exception for changes that only effect
the URL's fragment identifier ('#...'), and doing so will prevent breakage.

BUG=528681
R=jochen@chromium.org
==========

to

==========
Add a fragment change exception to history API's unique origin restrictions.

Things like jQuery Mobile and Apple's Keynote use hash changes via
'replaceState' for routing. Treating 'file:' URLs as unique breaks them.
We can fairly safely carve out an exception for changes that only effect
the URL's fragment identifier ('#...'), and doing so will prevent breakage.

BUG=528681
R=jochen@chromium.org

Committed: https://crrev.com/f5cdfde9135883c6cd83c81436ebe4888c432b8b
Cr-Commit-Position: refs/heads/master@{#371238}
==========

[commit-bot: I haz the power, 2016-01-25 14:32:03]

Patchset 2 (id:??) landed as
https://crrev.com/f5cdfde9135883c6cd83c81436ebe4888c432b8b
Cr-Commit-Position: refs/heads/master@{#371238}