Revert of Support "shouldResetAppCache" request parameter. (patchset #9 id:160001...

Revert of Support "shouldResetAppCache" request parameter. (patchset #9 id:160001 of https://codereview.chromium.org/669133002/)

Reason for revert:
http://build.chromium.org/p/chromium.memory.fyi/builders/Windows%20Unit%20%28DrMemory%20full%29%20%283%29/builds/4099/steps/memory%20test%3A%20content/logs/stdio

Original issue's description:
> Support "shouldResetAppCache" request parameter.
>
> This patch pulls parameter value to AppCacheRequestHandler.
>
> When parameter value is true - cache corresponding to manifest_url is resetted.
>
> shouldResetAppCache parameter is set by DevTools when "Disable Cache" mode is on, to ensure that pages are reloaded from network.
>
> Blink patch: https://codereview.chromium.org/723113002
>
> BUG=256672
>
> Committed: https://crrev.com/fd1ed6c36a08666dea471546c6e63d92997e815f
> Cr-Commit-Position: refs/heads/master@{#305795}
>
> Committed: https://crrev.com/28fb659df8b0f6f8ed91a47b02c117e8ee76012e
> Cr-Commit-Position: refs/heads/master@{#305960}

TBR=michaeln@chromium.org,jam@chromium.org,dcheng@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=256672

Review URL: https://codereview.chromium.org/765703002

Cr-Commit-Position: refs/heads/master@{#305971}