/data/data/com.android.chrome/app_chrome/GrShaderCache/GPUCache/

[patrickdrd]

/data/data/com.android.chrome/app_chrome/GrShaderCache/GPUCache/
should be deleted I think

[patrickdrd]

actually these are the files of chrome I'm deleting:

data/data/com.android.chrome/app_tabs/*/*
data/data/com.android.chrome/app_chrome/*/Bookmarks.bak
data/data/com.android.chrome/app_chrome/Default/IndexedDB/http.*indexeddb.leveldb*
data/data/com.android.chrome/app_chrome/BrowserMetrics*
data/data/com.android.chrome/app_chrome/GrShaderCache/GPUCache/

[d4rken]

I've made some improvements to the WebView filter. Added better matching for GrShaderCache and GPUCache, the others should be left alone.

[patrickdrd]

the others should be deleted too, I'm deleting them on both my desktop/laptop
(except the first one which exists only on android) and
eventually on two mobile devices too without any problem

you might want to check out this repo:
https://github.com/MoscaDotTo/Winapp2

I'm sure you'll learn interesting things about browser (and only) cleaning

[d4rken]

Changing this affects millions of devices, not just yours, so we have to be careful.

BrowserMetrics could be added to the analytics filter, if you can share some more details on that in an extra ticket I'll look into it for the next update.

Deleting app_tabs clears the list of open tabs in Chrome, this is not something I want usually.

Not sure about Default/IndexedDB/http.*indexeddb.leveldb* this would need further investigation, as well as Bookmarks.bak. Each would deserve an extra ticket with more details.

[patrickdrd]

correct, https://wiki.mozilla.org/Browser_Metrics is related to analytics,
also https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/zKSMVrpFVK8,
I would add it to analytics filter

bookmarks.bak is, as the name implies, a bookmarks backup,
which I personally don't need, because I'm using titanium backup and
my bookmarks are synced with my laptop/desktop too,
I've also got a bookmarks file kept separately (taken from windows chrome,
which I upload to my google drive as well)

indexeddb files are only usefiul on windows as well,
since there is extensions' data there:
MoscaDotTo/Winapp2#320
(and which I have excluded from cleanup on windows of course)
in android, where we don't have extensions I would say it's pretty much useless

as for app_tabs, I found 1000+ files there,
even though I always close all open tabs before closing chrome,
so I think there could be leftovers, at least in my case
I'm using custom tabs a lot too (since lynket: https://play.google.com/store/apps/details?id=arun.com.chromer is my default browser),
but why would I want a custom tab's state?

I understand your fist line, of course, after all it's your decision to make