Make NamedProxyLauncher connections more robust to errors. It now clears the channel file before launching Chrome and has a timeout when waiting for the file to be created.
Make NamedProxyLauncher connections more robust to errors. It now clears the channel file before launching Chrome and has a timeout when waiting for the file to be created.

BUG=66414
TEST=Should see no change in ui_tests. FLAKY_BasicNamedInterface may become non-flaky.

Review URL: http://codereview.chromium.org/6546030

git-svn-id: http://src.chromium.org/svn/trunk/src@76080 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: e19d11b517f6c94593d8a90d08003dcdbae61663
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser