When user "discards history," discard speculative data as well

The speculative system record the first 10 connections
that are made (at startup), and also learns about 
subresource connections made when the user visits 
sites.  This information implies visitation history,
and needs to be discarded when the user 


BUG=62891
r=eroman,sky
Review URL: http://codereview.chromium.org/6538007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@75525 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed