Fix 64-bit warnings (for 64-bit Windows build)
Fix 64-bit warnings (for 64-bit Windows build)

BUG=28176
TEST=none
Review URL: http://codereview.chromium.org/416003

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@32620 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