Set a type for the Blob used in createCDNWrapper (issue 17259)

[Snuffleupagus]

Hopefully this is enough to address the problem of initializing the Worker in Chromium-based browsers.
Locally I've tried to force use of createCDNWrapper in development mode, by commenting out the isSameOrigin checks, and worker-loading fails against master and works with this patch.

[Snuffleupagus]

/botio-linux preview

[moz-tools-bot]

From: Bot.io (Linux m4)

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Received

Command cmd_preview from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.241.84.105:8877/facc775a7afaf17/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

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Success

Full output at http://54.241.84.105:8877/facc775a7afaf17/output.txt

Total script time: 1.40 mins

Published

• Viewer: http://54.241.84.105:8877/facc775a7afaf17/web/viewer.html
• Viewer (legacy): http://54.241.84.105:8877/facc775a7afaf17/legacy/web/viewer.html

[Snuffleupagus]

/botio xfatest

[moz-tools-bot]

From: Bot.io (Windows)

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Received

Command cmd_xfatest from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.193.163.58:8877/007a88646145100/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Received

Command cmd_xfatest from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.241.84.105:8877/0bb56e1b2432b7d/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

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Failed

Full output at http://54.241.84.105:8877/0bb56e1b2432b7d/output.txt

Total script time: 11.15 mins

• Font tests: Passed
• Unit tests: Passed
• Integration Tests: FAILED
• Regression tests: FAILED

  different ref/snapshot: 1

Image differences available at: http://54.241.84.105:8877/0bb56e1b2432b7d/reftest-analyzer.html#web=eq.log

[moz-tools-bot]

From: Bot.io (Windows)

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Failed

Full output at http://54.193.163.58:8877/007a88646145100/output.txt

Total script time: 18.90 mins

• Font tests: FAILED
• Unit tests: Passed
• Integration Tests: FAILED
• Regression tests: FAILED

  different ref/snapshot: 1

Image differences available at: http://54.193.163.58:8877/007a88646145100/reftest-analyzer.html#web=eq.log

[timvandermeij]

Looks good!

[Snuffleupagus]

Testing https://mozilla.github.io/pdf.js/examples/#interactive-examples now, after this has landed, it seems that worker-loading is now functioning as expected/intended in both Mozilla Firefox and Google Chrome.