Chrome based browsers are notorious for growing humungous appdata folders
if you dont regularly clear your cache or history files we are talking loads of info.
So here's my custom entry for Chromium browser,
Its pretty much gonna delete all but the essential stuff
so if you add it to your winapp2.ini file,
make sure you edit out the stuff you wanna keep.
Also if you use a Chromium portable version just change the pathes below to your stored portable's profile.
Take note that some of the entries/folders are from earlier releases and may no longer be in use
I only included them just in case tho

Code:
[Chromium - Cache*]
Section=Chromium
LangRef=Cache
FileKey1=%localappdata%\Chromium\User Data\Default\Cache|*.*|RECURSE|REMOVESELF|
FileKey2=%localappdata%\Chromium\User Data\Default\databases|*.*|RECURSE|REMOVESELF|
FileKey3=%localappdata%\Chromium\User Data\Default|*Favicons*
FileKey4=%localappdata%\Chromium\User Data\Default|*Favicons-journal*
FileKey5=%localappdata%\Chromium\User Data\Default\Media Cache|*.*|RECURSE|REMOVESELF|
FileKey6=%localappdata%\Chromium\User Data\Default\MediaCache|*.*|RECURSE|REMOVESELF|
;FileKey7=%localappdata%\Chromium\User Data\Default\Plugin Data|*.*|RECURSE|REMOVESELF|
;FileKey8=%localappdata%\Chromium\User Data\Default\User StyleSheets|*.*|RECURSE|REMOVESELF|
[Chromium - Cookies*]
Section=Chromium
LangRef=Cookies
FileKey1=%localappdata%\Chromium\User Data\Default|Cookies
FileKey2=%localappdata%\Chromium\User Data\Default|ExtensionCookies
[Chromium - History*]
Section=Chromium
LangRef=History
FileKey1=%localappdata%\Chromium\User Data\Default|*Archived History*
FileKey2=%localappdata%\Chromium\User Data\Default|*History*
FileKey3=%localappdata%\Chromium\User Data\Default|Thumbnails
FileKey4=%localappdata%\Chromium\User Data\Default|Top Sites
FileKey5=%localappdata%\Chromium\User Data\Default|Visited Links
[Chromium - Form Data*]
Section=Chromium
LangRef=Form Data
FileKey1=%localappdata%\Chromium\User Data\Default|*Web Data*
FileKey2=%localappdata%\Chromium\User Data\Default|*Web Data-journal*
[Chromium - Session Restore*]
Section=Chromium
LangRef=Session Restore
FileKey1=%localappdata%\Chromium\User Data\Default|Current*
FileKey2=%localappdata%\Chromium\User Data\Default|Current Tabs*
FileKey3=%localappdata%\Chromium\User Data\Default|Last*
;FileKey4=%localappdata%\Chromium\User Data|chrome_shutdown_ms.txt