Fixes bug in calculating size of tabs on linux tab strip. Specifically I wasn't calculating the available width correctly when there are pinned tabs.
Fixes bug in calculating size of tabs on linux tab strip. Specifically
I wasn't calculating the available width correctly when there are
pinned tabs.

BUG=18134
TEST=see bug

Review URL: http://codereview.chromium.org/159812

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@22319 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