Fix a bug being unable to remove appcaches via chrome:appcache-internals if the manifest url contains special characters like '?' or '='.
Fix a bug being unable to remove appcaches via chrome:appcache-internals if the manifest url contains special characters like '?' or '='.

BUG=none
TEST=manual

Review URL: http://codereview.chromium.org/2806025

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@50795 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