Display function signatures instead of just "Function".

BUG=
R=alanknight@google.com

Review URL: https://codereview.chromium.org//273473002
Don't show the package name in the breadcrumbs if you're ownly showing one
package.

Also, allow for multiple html elements in the comments.

BUG=
R=alanknight@google.com

Review URL: https://codereview.chromium.org//271253004
Merge remote-tracking branch 'upstream/master' into angular-skin