Revert of [Cast] Add back ignored width/height in RtpPayloadParams IDL for Chrome 43.

Revert of [Cast] Add back ignored width/height in RtpPayloadParams IDL for Chrome 43. (patchset #1 id:1 of https://codereview.chromium.org/1009643002/)

Reason for revert:
As discussed in bug 466357, the plan was to revert this patchset for Chrome 44 and later.  These fields will be gone starting in Chrome 46, assuming this lands within the next couple weeks.

Original issue's description:
> [Cast] Add back ignored width/height in RtpPayloadParams IDL for Chrome 43.
>
> A recent change (https://codereview.chromium.org/973753002/) removed the
> width/height properties from the IDL, but the Google Cast Extension needs
> them to be present until a patch rolls out to all Chrome Canary/Dev/Beta
> users.
>
> BUG=466357
> TBR=finnur@chromium.org
>
> Committed: https://crrev.com/5ba8aa856919269a1a079c376d70480da0c2fc23
> Cr-Commit-Position: refs/heads/master@{#320634}

TBR=finnur@chromium.org
BUG=466357
Committed: https://crrev.com/6c3cda906f10db581a6df15d0f0324fd6aa2dbd5
Cr-Commit-Position: refs/heads/master@{#341474}

[miu, 2015-08-02 00:58:26]

Created Revert of [Cast] Add back ignored width/height in RtpPayloadParams IDL
for Chrome 43.

[miu, 2015-08-02 00:59:20]

FYI...About to do a CQ dry-run, and I will land if that passes.

[miu, 2015-08-02 00:59:25]

The CQ bit was checked by miu@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-08-02 00:59:28]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1267073004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1267073004/1

[commit-bot: I haz the power, 2015-08-02 02:16:12]

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

[commit-bot: I haz the power, 2015-08-02 02:16:13]

Dry run: This issue passed the CQ dry run.

[miu, 2015-08-02 02:34:07]

The CQ bit was checked by miu@chromium.org

[commit-bot: I haz the power, 2015-08-02 02:34:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1267073004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1267073004/1

[commit-bot: I haz the power, 2015-08-02 02:39:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-02 02:40:37]

Patchset 1 (id:??) landed as
https://crrev.com/6c3cda906f10db581a6df15d0f0324fd6aa2dbd5
Cr-Commit-Position: refs/heads/master@{#341474}