Land assets for menu overflow and hierarchy

These are currently drawn with pdf files on mac and with a
mixture of code and assets on views.

The assets in this CL are not used yet, so no effect.

BUG=111101
TBR=sail

Review URL: https://codereview.chromium.org/12018026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@177772 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed