I believe this is the one for Mac
chromium src/ios/chrome/app/theme/ios_theme_resources.grd
    29:   <structure type="chrome_scaled_image" name="IDR_IOS_INFOBAR_SAVE_PASSWORD" file="infobar_save_password.png" />
    30:   <structure type="chrome_scaled_image" name="IDR_IOS_INFOBAR_TRANSLATE" file="infobar_translate.png" />
    31: </structures>
chromium src/ios/chrome/browser/translate/chrome_ios_translate_client.mm
   138: int ChromeIOSTranslateClient::GetInfobarIconID() const {
   139:   return IDR_IOS_INFOBAR_TRANSLATE;
   140: }

How do you make a COLOR version of vertorize icon ? That is what currently used on Mac for many icons

CreateVectorIcon takes a color param. If you need multiple colors in one icon you can define them in the .icon file.

The attached icon is super old. We don't use that any more. 
If we are talking about the omnibar icon, we should use the attached.
If we are talking about the icon that appears inside the bubble, we should use the Google Translate product icon.

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omnibox_translate-2x.svg 2.3 KB Download

Yes, we are talking about the one inside the bubble. pendar@, can you link to the specific icon you're talking about?

Just to reconfirm, you're talking about the icon here:
https://screenshot.googleplex.com/YS7Y5BncriO

If so, you can download the SVG from go/icons:
https://icons.googleplex.com/#icon=logo_translate&search=translate

oh right sorry, I was confused and attached the wrong image. Should be this one.

I actually don't think we have to do anything here (sticking with png is fine for more complicated icons like this).

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	ui_resources_default_200_percent_common_translate.png 3.1 KB View Download