GitLab

top level navigations twice for the same render view. 

Fix is to reset the page_id counters once we route the top level navigations to the
host browser.

TBR=amit

Review URL: http://codereview.chromium.org/3192012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57133 0039d316-1c4b-4281-b951-d872f2087c98