Removed the static on all histogram macros. If this change sticks, then we could stop using these macros and will change all the code that use histogram macros.
Removed the static on all histogram macros. If this change
sticks, then we could stop using these macros and will change
all the code that use histogram macros.

BUG=76092
TEST=histogram unit tests and watch out if this change 
     has performance impact. We did a trial run of this patch
     and we didn't see any impact in performance bots.
R=jar

Review URL: http://codereview.chromium.org/6667061

git-svn-id: http://src.chromium.org/svn/trunk/src@78460 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: dbc9db5d51188e2bf88157650a3a3540063c5d3a
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser