media: Simplify {Audio|Video}Decoder initialization callback.

media: Simplify {Audio|Video}Decoder initialization callback.

Use base::Callback<void(bool)> instead of a PipelineStatusCB for decoder initialization where PipelineStatus is not really relevant. This helps clean up unnecessary uses of PipelineStatusCB so in the future we could plumb more info in PipelineStatusCB (e.g. error messages) to help debugging/testing.

TBR=bbudge@chromium.org
BUG=126070
TEST=Updated unittests.

Committed: https://crrev.com/cb8f0c2260d44d6610a4c157b70c01cda1f50913
Cr-Commit-Position: refs/heads/master@{#333127}

[xhwang, 2015-06-03 18:14:40]

rebase only

[xhwang, 2015-06-03 21:00:58]

xhwang@chromium.org changed reviewers:
+ dalecurtis@chromium.org, watk@chromium.org

[xhwang, 2015-06-03 21:00:58]

xhwang@chromium.org changed required reviewers:
+ watk@chromium.org

[xhwang, 2015-06-03 21:01:56]

watk: Please review everything.
dalecurtis: Please review from a high level perspective.

[DaleCurtis, 2015-06-04 01:03:42]

eyes glazed over a bit reading this, but lgtm :)

[xhwang, 2015-06-05 17:24:38]

rebase only

[watk, 2015-06-05 19:49:08]

lgtm!

[xhwang, 2015-06-05 19:50:13]

The CQ bit was checked by xhwang@chromium.org

[xhwang, 2015-06-05 19:50:13]

The patchset sent to the CQ was uploaded after l-g-t-m from
dalecurtis@chromium.org
Link to the patchset: https://codereview.chromium.org/1156643007/#ps40001
(title: "rebase only")

[commit-bot: I haz the power, 2015-06-05 19:52:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156643007/40001

[commit-bot: I haz the power, 2015-06-05 20:03:12]

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

[commit-bot: I haz the power, 2015-06-05 20:03:13]

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...)

[xhwang, 2015-06-05 20:08:04]

TBRing bbudge@chromium.org for content/renderer/pepper/video_decoder_shim.cc
change which is trivial.

[xhwang, 2015-06-05 20:08:16]

The CQ bit was checked by xhwang@chromium.org

[commit-bot: I haz the power, 2015-06-05 20:08:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156643007/40001

[commit-bot: I haz the power, 2015-06-05 20:52:20]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-06-05 20:54:03]

Patchset 3 (id:??) landed as
https://crrev.com/cb8f0c2260d44d6610a4c157b70c01cda1f50913
Cr-Commit-Position: refs/heads/master@{#333127}

[Nicolas Zea, 2015-06-05 21:27:31]

A revert of this CL (patchset #3 id:40001) has been created in
https://codereview.chromium.org/1146913008/ by zea@chromium.org.

The reason for reverting is: Compile failure on mac:
http://build.chromium.org/p/chromium/buildstatus?builder=Mac&number=3225.

[xhwang, 2015-06-05 21:48:38]

On 2015/06/05 21:27:31, Nicolas Zea wrote:
> A revert of this CL (patchset #3 id:40001) has been created in
> https://codereview.chromium.org/1146913008/ by mailto:zea@chromium.org.
> 
> The reason for reverting is: Compile failure on mac:
> http://build.chromium.org/p/chromium/buildstatus?builder=Mac&number=3225.

Thanks for the revert. I'll fix it and reland...