Remove unused code calling WebMediaPlayerClient::requestFullscreen()

Remove unused code calling WebMediaPlayerClient::requestFullscreen()

This was used for a while and then removed again:
https://codereview.chromium.org/41123002
https://codereview.chromium.org/1021723003

BUG=496627
Committed: https://crrev.com/8456c96c8ddcb13363cdbd3a7112d8aa9cf1967e
Cr-Commit-Position: refs/heads/master@{#334132}

[philipj_slow, 2015-06-04 11:08:23]

philipj@opera.com changed reviewers:
+ qinmin@chromium.org, xhwang@chromium.org

[philipj_slow, 2015-06-04 11:08:24]

PTAL. I've successfully built chrome_public_apk with this change so unless
there's non-public code this really is unused now. Removing it would simplify
things about around some fullscreen changes I am working on. Thanks!

Blink CL: https://codereview.chromium.org/1157253010

[xhwang, 2015-06-11 16:14:57]

On 2015/06/04 11:08:24, philipj wrote:
> PTAL. I've successfully built chrome_public_apk with this change so unless
> there's non-public code this really is unused now. Removing it would simplify
> things about around some fullscreen changes I am working on. Thanks!
> 
> Blink CL: https://codereview.chromium.org/1157253010

Sorry for the delay. I'll defer to qinmin@ to do the full review since he's the
most familiar with this code.

[xhwang, 2015-06-11 16:19:32]

cc ddorwin: FYI

I meant lgtm from me. But you need qinmin's approval as well since he added
these code.

[qinmin, 2015-06-11 19:16:41]

lgtm

[philipj_slow, 2015-06-11 19:31:37]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2015-06-11 19:32:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156273006/1

[commit-bot: I haz the power, 2015-06-11 19:43:07]

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

[commit-bot: I haz the power, 2015-06-11 19:43:08]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[philipj_slow, 2015-06-11 19:46:48]

philipj@opera.com changed reviewers:
+ mkwst@chromium.org

[philipj_slow, 2015-06-11 19:46:48]

mkwst@, owners review for content/common/media/media_player_messages_android.h
please? :)

[Mike West, 2015-06-12 07:28:53]

Removing messages _always_ LGTM. :)

[philipj_slow, 2015-06-12 07:38:30]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2015-06-12 07:38:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156273006/1

[commit-bot: I haz the power, 2015-06-12 07:42:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-12 07:42:55]

Patchset 1 (id:??) landed as
https://crrev.com/8456c96c8ddcb13363cdbd3a7112d8aa9cf1967e
Cr-Commit-Position: refs/heads/master@{#334132}