suppress UNINIT error on disk_cache::SimpleSynchronousEntry::WriteSparseRange
TBR=ttuttle@chromium.org
BUG=314091
TEST=waterfall.sh

Review URL: https://codereview.chromium.org/55773003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232402 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232402
Revert 232369 "Revert 232312 "Cleanup ResourceFetcher in prepara..."

Revert didn't fix failing test.

> Revert 232312 "Cleanup ResourceFetcher in preparation to add to ..."
> 
> Seems to cause ResourceFetcherTests.ResourceFetcherDeletedInCallback
> to timeout on Windows and crash on Linux.
> 
> > Cleanup ResourceFetcher in preparation to add to public content API,
> > in preparation to move error page logic from content to chrome:
> > 
> > * Merge ResourceFetcher and ResourceFetcherWithTimeout.
> > * Remove unnecessary member variables.
> > * Remove Cancel() (All consumers were deleting and cancelling at the
> >     same time, anyways, and deleting already cancels).
> > * Make definition order match declaration order.
> > * Fix outdated comments.
> > 
> > BUG=308232
> > 
> > Review URL: https://codereview.chromium.org/33363003
> 
> TBR=mmenke@chromium.org
> 
> Review URL: https://codereview.chromium.org/55963002

TBR=csharp@chromium.org

Review URL: https://codereview.chromium.org/55943003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232403 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232403