I am once again back at reporting another bug.
Currently doorhanger does not show or render anything, like as shown in below picture:

I use Chromium Snapshots (little too much bleeding edge). Current build I am using is: 32.0.1685.0 (231480)
EDIT: I am on Windows 8.1 64-bit GA1 with 32-bit Chromium.
EIDT#2: I have only three modified about
1. Enable Experimental Extension APIs (Enabled)
2. Enable Extend Instant API (Disabled)
3. Enable local first-load NTP in Instant Extended (Disabled)
Best of Luck for fixing. I try to disable all Flags and other addons to confirm this issue persist.
Regards