Shard browser.lib

It fails to link if win_z7 = 1 (recommended goma setting).

BUG=

Review URL: https://codereview.chromium.org/123323002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254345 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254345