Removing prefixMatch attribute of CacheQueryOptions- Chromium Side

Removing prefixMatch attribute of CacheQueryOptions.

As get removed in latest specs, removing it.
spec: https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#cache-query-options-dictionary

PATCH 1: Chromium: [THIS PATCH]
PATCH 2: Blink: https://codereview.chromium.org/927723003/

BUG=462837
Committed: https://crrev.com/91784b8a7800d1a09c10d89c2b4e424fae0c5383
Cr-Commit-Position: refs/heads/master@{#318842}

[Paritosh Kumar, 2015-02-20 04:41:34]

paritosh.in@samsung.com changed reviewers:
+ a.cavalcanti@samsung.com

[Paritosh Kumar, 2015-02-20 04:41:34]

Please have a look.

[Paritosh Kumar, 2015-02-27 09:36:05]

paritosh.in@samsung.com changed reviewers:
+ horo@chromium.org, jsbell@chromium.org, mkwst@chromium.org

[Paritosh Kumar, 2015-02-27 09:36:05]

Please have a look.

[jsbell, 2015-02-27 16:44:25]

lgtm as non-owner

[horo, 2015-03-02 02:28:59]

lgtm

[Paritosh Kumar, 2015-03-02 13:19:10]

paritosh.in@samsung.com changed reviewers:
+ pfeldman@chromium.org

[Paritosh Kumar, 2015-03-02 13:23:37]

@mike: Please have a look.

[Mike West, 2015-03-02 14:45:22]

On 2015/03/02 at 13:23:37, paritosh.in wrote:
> @mike: Please have a look.

IPC LGTM

[Paritosh Kumar, 2015-03-03 04:00:47]

The CQ bit was checked by paritosh.in@samsung.com

[commit-bot: I haz the power, 2015-03-03 04:01:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/941683002/1

[commit-bot: I haz the power, 2015-03-03 05:35:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-03 05:35:46]

Patchset 1 (id:??) landed as
https://crrev.com/91784b8a7800d1a09c10d89c2b4e424fae0c5383
Cr-Commit-Position: refs/heads/master@{#318842}