Increase the plugin process teardown timeout from 10s to 5min.

This change is somewhat arbitrary, but reduces churn on creating
new plugin processes.  When plugin initialization is expensive,
this can reduce page load time.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/2029010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@47167 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed