View Page Source opens blank tab

[LaurenWags]

Test plan

See #15078

Description

When selecting View Page Source from right-click menu, a blank tab is opened instead of a tab with the page source info. This does not happen in 0.23.79.

Steps to Reproduce

1. Navigate to a web page. (I was on https://smittenkitchen.com/2009/07/sour-cherry-slab-pie/ but any page will do)
2. Right click somewhere on the background of the page.
3. Select View Page Source.

Actual result:
Blank tab (about:blank) opens instead of a page showing the page source info.

Expected result:
New tab with page source info should be displayed as in 0.23.79.

Reproduces how often:
easily

Brave Version

about:brave info:

Brave: 0.23.103
V8: 6.8.275.24
rev: ae8e277
Muon: 8.0.8
OS Release: 16.7.0
Update Channel: Release
OS Architecture: x64
OS Platform: macOS
Node.js: 7.9.0
Brave Sync: v1.4.2
libchromiumcontent: 68.0.3440.84

Reproducible on current live release:
no

Additional Information

Possibly related to #15057 , #15045

[bsclifton]

caused by #15047

[btlechowski]

Verified on Ubuntu 17.10 x64

• 0.23.104 b454a4a
• Muon 8.0.8
• libchromiumcontent 68.0.3440.84

Verified with macOS 10.12.6 using

• 0.23.104 b454a4a
• Muon 8.0.8
• libchromiumcontent 68.0.3440.84

Verified on Windows 10 x64 using

• 0.23.104 b454a4a
• Muon 8.0.8
• libchromiumcontent 68.0.3440.84