This deletes some assets that are now unused:
 - infobar_button_*
 - infobar_shadow
 - infobar_update_uma (not used in Chromium)

Updates some infobar icons with pretty new blue versions:
 - infobar_microphone
 - infobar_protected_media_identifier

And deletes icons for infobars that never appear on Android:
 - infobar_theme
 - infobar_cookie
 - infobar_desktop_notifications
 - infobar_didyoumean
 - infobar_plugin
 - infobar_plugin_crashed
 - infobar_restore

This also renames infobar_autofill.png to infobar_autofill_cc.png since
it always refers to credit card-related autofill.

R=dfalcantara@chromium.org, dtrainor@chromium.org, estade@chromium.org, oshima@chromium.org
TBR=oshima@chromium.org
BUG=375379
BUG=386359

Review URL: https://codereview.chromium.org/383123008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282752 0039d316-1c4b-4281-b951-d872f2087c98