Revert of Cache feedback reports to disk in case of send failure. (https://codereview.chromium.org/141433011/)

Reason for revert:
This change is causing memory error on this bot:

http://build.chromium.org/p/chromium.memory.fyi/builders/Windows%20Unit%20%28DrMemory%29/builds/15509


Original issue's description:
> Cache feedback reports to disk in case of send failure.
> 
> R=zork@chromium.org
> BUG=249853
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=246992

TBR=zork@chromium.org,thestig@chromium.org,rkc@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=249853

Review URL: https://codereview.chromium.org/133193004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247061 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247061