Added support for self.origin in Window and WorkerGlobalScope

[chromium-wpt-export-bot]

Added origin to the interface files
Added firefox tests for frames into the wpt
Created and added tests for workers into the wpt
Intent to ship: https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/oPGdc9lqpg8/gSjBah0YCAAJ

BUG=690195,694444
R=mkwst@chromium.org

Review-Url: https://codereview.chromium.org/2706013002
Cr-Commit-Position: refs/heads/master@{#454747}

[wpt-pr-bot]

Notifying @Ms2ger, @ayg, @jdm, @jgraham, @zcorpan, and @zqzhang. (Learn how reviewing works.)

[w3c-bots]

View the complete job log.

Firefox (nightly channel)

Testing web-platform-tests at revision 4eb18e2
Using browser at version BuildID 20170302110226; SourceStamp e91de6fb2b3dce9c932428265b0fdb630ea470d7
Starting 10 test iterations
All results were stable

All results

1 test ran

/html/webappapis/the-windoworworkerglobalscope-mixin/Worker_Self_Origin.html

Subtest	Results	Messages
	OK
Same Origin Worker	PASS
Same Origin SharedWorker	PASS
Data Url Worker	PASS
Data Url SharedWorker	PASS
Blob Url Worker	PASS
Blob Url SharedWorker	PASS

[w3c-bots]

View the complete job log.

Chrome (unstable channel)

Testing web-platform-tests at revision 4eb18e2
Using browser at version 58.0.3026.3 dev
Starting 10 test iterations
All results were stable

All results

1 test ran

/html/webappapis/the-windoworworkerglobalscope-mixin/Worker_Self_Origin.html

Subtest	Results	Messages
	OK
Same Origin Worker	PASS
Same Origin SharedWorker	PASS
Data Url Worker	FAIL	assert_equals: expected (string) "null" but got (undefined) undefined
Data Url SharedWorker	FAIL	assert_equals: expected (string) "null" but got (undefined) undefined
Blob Url Worker	PASS
Blob Url SharedWorker	PASS