URL.createObjectURL() incompatibility

[NathanaelA]

Test plan

See brave/brave-core#2342

Description

Docs: https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL

Steps to Reproduce

Using createObjectURL seems to create a state where Brave gets confused about things.
Basically the code generates a PDF in memory; and assigns it to an iFrame. Brave seems to be the only one affected and shows the following warning in the console.log:

Resource interpreted as Document but transferred with MIME type application/pdf: "blob:http://www.fluentreports.com/b4ffad1e-0f9e-4769-baf7-ea8cc21e454f".

Broken sites because of this:

1. http://pdfkit.org/demo/browser.html
2. http://www.fluentreports.com/demo.html

Actual result:

Expected result:

(From Chromium)

Reproduces how often:

Always

Brave version (brave://version info)

Windows (Should be current version)
Linux 0.63.48 Chromium: 74.0.3729.108 (Official Build) (64-bit)

Version/Channel Information:

Current Release (Been this way for a while, just haven't reported it)

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
  No.

• Does the issue resolve itself when disabling Brave Rewards?
  Unknown

• Is the issue reproducible on the latest version of Chrome?
  No, Chrome/Firefox/etc work great.

Miscellaneous Information:

The PDF blob source is being assigned to an iFrame.src property. (FluentReports is my site; so if you need any code to see, let me know)

[bsclifton]

Confirmed this is fixed with brave/brave-core#2342 🎉

[btlechowski]

Verification passed on

Brave	0.68.113 Chromium: 76.0.3809.62 (Official Build) beta (64-bit)
Revision	7b77856b3aa34d72f246d12340fc1ded8b2c0e83-refs/branch-heads/3809@{#798}
OS	Windows 7 Service Pack 1 (Build 7601.24494)

Verified test plan from brave/brave-core#2342
Verified test plan from the description.

Verification passed on

Brave	0.68.113 Chromium: 76.0.3809.62 (Official Build) beta (64-bit)
Revision	7b77856b3aa34d72f246d12340fc1ded8b2c0e83-refs/branch-heads/3809@{#798}
OS	Linux

• Verified PDF preview is generated on the link from issue description
  

Verified passed with

Brave	0.68.114 Chromium: 76.0.3809.87 (Official Build) beta (64-bit)
Revision	111fe1e15d5ced26080a7dc239bcfe70f6c49aad-refs/branch-heads/3809@{#967}
OS	Mac OS X

• Verified test plan from Use pdfium brave-core#2342

[Naliniamu]

what is pipestream. is there anypackage for using pipe stream. how to send report as stream to browser