Under he --new-profile-management flag, migrate the desktop profile avatars (hamburger, ninja) to the CrOS ones (penguin, dog, blurry circles).

Regarding the avatar resource files: I will have a followup CL to move the
resource files to /common, once this lands. For now we'd like to monitor
how including these files affects the size of the binary, and if it
increases too much, have an easier revert.

BUG=312352

Review URL: https://codereview.chromium.org/60263002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234195 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234195