[Win] New avatar bubble should be a fixed width.

The avatar bubble should be a constant widht of 250px, and things should
be elided correctly automatically.

BUG=334761

Review URL: https://codereview.chromium.org/140623007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250360 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250360
Fix install_host.sh script in the nativeMessaging example

The script had $HOME inside single-quoted string. As result
it was creating directory called '$HOME'.

TBR=kalman@chromium.org

Review URL: https://codereview.chromium.org/153003004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250361 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250361