Revert of Ensuring interception of stream get determined by plugin path before checking mime type.

Revert of Ensuring interception of stream get determined by plugin path before  checking mime type. (patchset #16 id:300001 of https://codereview.chromium.org/953793003/)

Reason for revert:
Need  to fix some more logic for r475390.
Once that will get fixed , I will re land this patch again.

Original issue's description:
> Ensuring interception of stream get determined by plugin path before checking mime type.
>
> Earlier we are checking whether a extension with url that have mime type
> should be intercepted as stream by checking plugin availablity.
> Now we are passing plugin path and then checking whether their is
> MimehandlerView Plugin available with that path and then we are allowing
> intercepted as stream. So now interception is not depends upon mimetype.
>
> BUG=443466
>
> Committed: https://crrev.com/d7d1167121bfe4b80d2cdf7559171aeff25c02c6
> Cr-Commit-Position: refs/heads/master@{#324187}

TBR=jochen@chromium.org,jam@chromium.org,mmenke@chromium.org,raymes@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=443466
Committed: https://crrev.com/e3557dd31bb2b06d6317f04b9274ece25c547d9a
Cr-Commit-Position: refs/heads/master@{#324841}

[Deepak, 2015-04-13 04:08:12]

Created Revert of Ensuring interception of stream get determined by plugin path
before  checking mime type.

[commit-bot: I haz the power, 2015-04-13 04:08:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1081013002/1

[commit-bot: I haz the power, 2015-04-13 04:08:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-13 04:08:25]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[raymes, 2015-04-13 04:10:47]

The CQ bit was checked by raymes@chromium.org

[commit-bot: I haz the power, 2015-04-13 04:10:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1081013002/1

[commit-bot: I haz the power, 2015-04-13 04:11:01]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-13 04:11:01]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[jochen (gone - plz use gerrit), 2015-04-13 13:07:19]

lgtm

[Deepak, 2015-04-13 13:07:52]

The CQ bit was checked by deepak.m1@samsung.com

[commit-bot: I haz the power, 2015-04-13 13:08:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1081013002/1

[commit-bot: I haz the power, 2015-04-13 13:09:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-13 13:10:20]

Patchset 1 (id:??) landed as
https://crrev.com/e3557dd31bb2b06d6317f04b9274ece25c547d9a
Cr-Commit-Position: refs/heads/master@{#324841}