Remove 'blink::WebSerializedOrigin' (1/4)

Remove 'blink::WebSerializedOrigin' (1/4)

As part of the plan to rationalize Origins across Blink and its embedder,
we're dropping 'blink::WebSerializedOrigin' in favor of
'blink::WebSecurityOrigin' (which can serialize itself just fine).

Patch 1 (Chromium): This patch.
Patch 1 (Blink): https://codereview.chromium.org/1240083002
Patch 2 (Chromium): https://codereview.chromium.org/1229783005
Patch 3 (Blink): https://codereview.chromium.org/1231643010

BUG=508896
R=jochen@chromium.org

Committed: https://crrev.com/24235257364fcf3ad1597022364682f174d92791
Cr-Commit-Position: refs/heads/master@{#339235}

[Mike West, 2015-07-17 08:44:29]

Mind taking a look at this, Jochen? The GN build has the
'-Woverloaded-virtual' flag on which caught this. :/

[jochen (gone - plz use gerrit), 2015-07-17 09:26:26]

lgtm

[Mike West, 2015-07-17 09:44:02]

The CQ bit was checked by mkwst@chromium.org

[Mike West, 2015-07-17 09:44:02]

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/1244563002/#ps20001
(title: "forward")

[commit-bot: I haz the power, 2015-07-17 09:44:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1244563002/20001

[commit-bot: I haz the power, 2015-07-17 09:55:50]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-17 09:56:48]

Patchset 2 (id:??) landed as
https://crrev.com/24235257364fcf3ad1597022364682f174d92791
Cr-Commit-Position: refs/heads/master@{#339235}