All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=699711

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg1LjMpwoM


Bot(s) for this bug's original alert(s):

Android Builder

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8985655916075130752

Direct link to size graph:
https://chromeperf.appspot.com/report?sid=5d55db44beb13bb1e813882381fe82b47aa2934496f2e59840f8ee908da122ca&rev=455241

Although easy to see it's from images being added:
https://codereview.chromium.org/2652983002

dullweber - Could you see about obtaining vector drawables for these?

For reference, here's another ongoing change switching things over:
https://bugs.chromium.org/p/chromium/issues/detail?id=697861

I created a cl to replace the png files with vector images: http://crrev.com/2740893004

I asked Christian to leave some of the pngs (ic_history_grey600_24dp) because I need them for an in-flight CL that requires the asset to be tinted depending on selected state. While we are making progress toward being able to tint vector drawables, we still don't have an implemented solution (see issue 697888). The other PNGs can be converted to vector drawables.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aaa07f46771138c6b4f554ee34dba359ebd68813

commit aaa07f46771138c6b4f554ee34dba359ebd68813
Author: dullweber <dullweber@chromium.org>
Date: Mon Mar 13 15:53:42 2017

Replace png icons from CBD with vector graphics.

Screenshot with new vector icons (cache, passwords)
https://screenshot.googleplex.com/2CrUBWX3suU.png

Previous screenshot:
https://screenshot.googleplex.com/GQ0LeamyMkN.png

BUG= 699711 

Review-Url: https://codereview.chromium.org/2740893004
Cr-Commit-Position: refs/heads/master@{#456389}

[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-hdpi/ic_collections_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-hdpi/ic_vpn_key_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-mdpi/ic_collections_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-mdpi/ic_vpn_key_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-xhdpi/ic_collections_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-xhdpi/ic_vpn_key_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-xxhdpi/ic_collections_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-xxhdpi/ic_vpn_key_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-xxxhdpi/ic_collections_grey600_24dp.png
[delete] https://crrev.com/5597947fdabe0d8449d99f9d43c041613a501b47/chrome/android/java/res/drawable-xxxhdpi/ic_vpn_key_grey600_24dp.png
[add] https://crrev.com/aaa07f46771138c6b4f554ee34dba359ebd68813/chrome/android/java/res/drawable/ic_collections_grey.xml
[add] https://crrev.com/aaa07f46771138c6b4f554ee34dba359ebd68813/chrome/android/java/res/drawable/ic_vpn_key_grey.xml
[modify] https://crrev.com/aaa07f46771138c6b4f554ee34dba359ebd68813/chrome/android/java/src/org/chromium/chrome/browser/preferences/privacy/ClearBrowsingDataPreferences.java

I changed 2/3 of the png icons to vectors. The last one will be converted when the right way to tint vectors is figured out.

The remaining png file (ic_history_grey600_24dp) is used by chrome home. I'm not sure if it would be a good idea to replace it with a vector because it will be shown very frequently and png icons have better performance. Should this issue be closed?

ic_history_grey600_24dp shouldn't be converted to a vector, so, in my opinion, yes this can be closed. 

Closing this because most images have been converted and the last remaining image shouldn't be converted.