Fix a gcc 4.3 warning in page_action.h.
Fix a gcc 4.3 warning in page_action.h.

Patch from Livio Soares <liviobs@gmail.com>.
Review URL: http://codereview.chromium.org/99309

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@15126 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