/usr/share/icons/unity-webapps-applications/index.theme is in unity-webapps-common 2.4.17+15.10.20150616-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | [Icon Theme]
Name=unity-webapps-applications
Comment=Webapps Icons
Directories=apps/48,apps/52,apps/64,apps/128,48/apps,52/apps,64/apps,128/apps
[apps/48]
Size=48
Context=Applications
Type=Fixed
[apps/52]
Size=52
Context=Applications
Type=Fixed
[apps/64]
Size=64
Context=Applications
Type=Fixed
[apps/128]
Size=128
Context=Applications
Type=Fixed
[48/apps]
Size=48
Context=Applications
Type=Fixed
[52/apps]
Size=52
Context=Applications
Type=Fixed
[64/apps]
Size=64
Context=Applications
[128/apps]
Size=128
Context=Applications
Type=Fixed
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