Revert of Cache feedback reports to disk in case of send failure.

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
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247061

[Alpha Left Google, 2014-01-25 02:50:21]

Created Revert of Cache feedback reports to disk in case of send failure.

[commit-bot: I haz the power, 2014-01-25 02:51:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hclam@chromium.org/133193004/1

[commit-bot: I haz the power, 2014-01-25 02:52:51]

Change committed as 247061

[Alpha Left Google, 2014-01-25 03:23:11]

On 2014/01/25 02:52:51, I haz the power (commit-bot) wrote:
> Change committed as 247061

There's also a failure on Android:

http://build.chromium.org/p/chromium.webkit/builders/Android%20Tests%20%28dbg...