Temporarily define RTC_DISALLOW_ASSIGN in Chromium constructormagic override.

Temporarily define RTC_DISALLOW_ASSIGN in Chromium constructormagic override.

The override will be removed shortly in https://codereview.webrtc.org/1342543004/ This is to make the FYI bots happy meanwhile.

BUG=chromium:468375
TBR=tommi@webrtc.org
NOTRY=true

Committed: https://crrev.com/8dba03d6d7b54080a9f2429ccd0a6638a49e509c
Cr-Commit-Position: refs/heads/master@{#9951}

[Henrik Grunell WebRTC, 2015-09-16 11:44:14]

henrikg@webrtc.org changed reviewers:
+ tommi@webrtc.org

[Henrik Grunell WebRTC, 2015-09-16 11:44:18]

The CQ bit was checked by henrikg@webrtc.org

[commit-bot: I haz the power, 2015-09-16 11:44:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1345193002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1345193002/1

[commit-bot: I haz the power, 2015-09-16 11:45:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-16 11:45:37]

Patchset 1 (id:??) landed as
https://crrev.com/8dba03d6d7b54080a9f2429ccd0a6638a49e509c
Cr-Commit-Position: refs/heads/master@{#9951}

[tommi, 2015-09-16 16:40:56]

lgtm