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Prevent a DCHECK from firing.
As we adaptively learn about referrers to enhance DNS
pre-resolution, we are forced to evict some entries
to prevent accidentally getting really large lists
(when we make mistakes). Sometimes we evict a
referred item from a list *while* that item is being
resolved (because it was in teh list). In that case,
we have to be careful when we try to acrue credit
(latency savings).
r=paulg
Review URL: http://codereview.chromium.org/18527
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8531 0039d316-1c4b-4281-b951-d872f2087c98
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from compiling on linux.
Patch by Kunal Thakar <kunalt@gmail.com>,
original CL: http://codereview.chromium.org/10773
Review URL: http://codereview.chromium.org/12674
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@6034 0039d316-1c4b-4281-b951-d872f2087c98
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Use the HTTP "referer" header to identify subresources used during a
page load. Store that info, and use it when next visiting the referenced
hosts to pre-resolve the (probably) needed subresources.
This set of changes will surely evolve as we see how it plays out
on broader distribution (via histogram measurments), but this should be
the foundation of the change.
In design specs, this was previously referred to as "adaptive correlated
DNS prefetching."
r=mbelshe
Review URL: http://codereview.chromium.org/9168
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@4929 0039d316-1c4b-4281-b951-d872f2087c98
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