Lands http://codereview.chromium.org/669132 for Thiago:
Lands http://codereview.chromium.org/669132 for Thiago:

windows: Add UMA metrics for each time that the bookmarks toolbar menu
button it's clicked.

Since it isn't fully supported we need this to know how many people
are using it.

BUG=36191
TEST=none

Review URL: http://codereview.chromium.org/885005

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@41466 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser