Render extension URLs with chips.

This CL reuses the security chip to display the extension name in the omnibox.

Screenshot: https://drive.google.com/file/d/0B9q2eN9gDoUIelprUjk0dXlINHc/view?usp=sharing

BUG=453093

Review-Url: https://codereview.chromium.org/2555063003
Cr-Commit-Position: refs/heads/master@{#440298}
10 files changed