[Cast] Separate frame size from VideoSenderConfig in H264VideoToolboxEncoder.

[Cast] Separate frame size from VideoSenderConfig in H264VideoToolboxEncoder.

This is a prerequisite change for supporting variable video frame sizes
in Cast.  This allows a follow-up change to remove the width/height
properties from VideoSenderConfig.  Instead, the width/height is passed
to the ctor in a separate gfx::Size argument.

BUG=451277
Committed: https://crrev.com/a5cc14a27945deac78524ed75cf9b4d49cdec347
Cr-Commit-Position: refs/heads/master@{#313779}

[miu, 2015-01-28 22:03:46]

Patchset #1 (id:1) has been deleted

[miu, 2015-01-28 22:04:16]

miu@chromium.org changed reviewers:
+ jfroy@chromium.org

[miu, 2015-01-28 22:04:16]

jfroy: PTAL.

[jfroy, 2015-01-28 22:08:13]

LGTM

[miu, 2015-01-29 02:15:51]

The CQ bit was checked by miu@chromium.org

[commit-bot: I haz the power, 2015-01-29 02:16:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/883013003/20001

[commit-bot: I haz the power, 2015-01-29 02:16:29]

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

[commit-bot: I haz the power, 2015-01-29 02:16:30]

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.

[miu, 2015-01-29 02:33:53]

miu@chromium.org changed reviewers:
+ hubbe@chromium.org

[miu, 2015-01-29 02:33:54]

hubbe: Need you to rubber-stamp this, as a full committer.

[Alpha Left Google, 2015-01-29 19:55:52]

RSLGTM.

[Alpha Left Google, 2015-01-29 19:56:00]

On 2015/01/29 19:55:52, Alpha wrote:
> RSLGTM.

RS LGTM.

[miu, 2015-01-29 20:06:41]

The CQ bit was checked by miu@chromium.org

[commit-bot: I haz the power, 2015-01-29 20:08:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/883013003/20001

[commit-bot: I haz the power, 2015-01-29 20:47:41]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2015-01-29 20:48:58]

Patchset 1 (id:??) landed as
https://crrev.com/a5cc14a27945deac78524ed75cf9b4d49cdec347
Cr-Commit-Position: refs/heads/master@{#313779}