Allow Blob image src to be used as MediaNotification artwork

Allow Blob image src to be used as MediaNotification artwork

The ImageDownloader actually supports blob: scheme URLs, we should reduce the
restriction on MediaImage src to allow blob: URLs to be used.

Steps for testing:

* Navigate to http://xxyzzzq.github.io/sandbox/media-session/blob-icon-test.html
  and start playing media.
* Click "Choose File" to upload an image. The preferred image can be found at:
  http://xxyzzzq.github.io/sandbox/media-session/BLOB.png
* Observe the media notification. The icon should change.

BUG=616411
TEST=Manual

Committed: https://crrev.com/b025c5c637cde4d106038868eb5ad170ba168e66
Cr-Commit-Position: refs/heads/master@{#436668}

[Zhiqiang Zhang (Slow), 2016-12-06 15:55:16]

zqzhang@chromium.org changed reviewers:
+ avayvod@chromium.org

[whywhat, 2016-12-06 16:43:12]

lgtm

can we have a test of some sort?

[Zhiqiang Zhang (Slow), 2016-12-06 17:33:40]

Description was changed from

==========
Allow Blob image src to be used as MediaNotification artwork

The ImageDownloader actually supports blob: scheme URLs, we should reduce the
restriction on MediaImage src to allow blob: URLs to be used.

BUG=616411
TEST=Manual
==========

to

==========
Allow Blob image src to be used as MediaNotification artwork

The ImageDownloader actually supports blob: scheme URLs, we should reduce the
restriction on MediaImage src to allow blob: URLs to be used.

Steps for testing:

* Navigate to http://xxyzzzq.github.io/sandbox/media-session/blob-icon-test.html
  and start playing media.
* Click "Choose File" to upload an image. The preferred image can be found at:
  http://xxyzzzq.github.io/sandbox/media-session/BLOB.png
* Observe the media notification. The icon should change.

BUG=616411
TEST=Manual
==========

[Zhiqiang Zhang (Slow), 2016-12-06 17:34:41]

On 2016/12/06 16:43:12, whywhat_OOO_till_Mon_Nov_28 wrote:
> lgtm
> 
> can we have a test of some sort?

I wrote a simple test page for this change (though it's a big ugly since I'm not
familiar with blob)

[Zhiqiang Zhang (Slow), 2016-12-06 17:34:46]

The CQ bit was checked by zqzhang@chromium.org

[commit-bot: I haz the power, 2016-12-06 17:35:28]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-06 18:57:14]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1481045686636410, "parent_rev":
"87ead255f2590c79250e925ac046161e479601d4", "commit_rev":
"5663a4dac9cfae464ec0c01ad22c1e92b872060d"}

[commit-bot: I haz the power, 2016-12-06 18:57:38]

Description was changed from

==========
Allow Blob image src to be used as MediaNotification artwork

The ImageDownloader actually supports blob: scheme URLs, we should reduce the
restriction on MediaImage src to allow blob: URLs to be used.

Steps for testing:

* Navigate to http://xxyzzzq.github.io/sandbox/media-session/blob-icon-test.html
  and start playing media.
* Click "Choose File" to upload an image. The preferred image can be found at:
  http://xxyzzzq.github.io/sandbox/media-session/BLOB.png
* Observe the media notification. The icon should change.

BUG=616411
TEST=Manual
==========

to

==========
Allow Blob image src to be used as MediaNotification artwork

The ImageDownloader actually supports blob: scheme URLs, we should reduce the
restriction on MediaImage src to allow blob: URLs to be used.

Steps for testing:

* Navigate to http://xxyzzzq.github.io/sandbox/media-session/blob-icon-test.html
  and start playing media.
* Click "Choose File" to upload an image. The preferred image can be found at:
  http://xxyzzzq.github.io/sandbox/media-session/BLOB.png
* Observe the media notification. The icon should change.

BUG=616411
TEST=Manual
==========

[commit-bot: I haz the power, 2016-12-06 18:57:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-06 19:02:05]

Description was changed from

==========
Allow Blob image src to be used as MediaNotification artwork

The ImageDownloader actually supports blob: scheme URLs, we should reduce the
restriction on MediaImage src to allow blob: URLs to be used.

Steps for testing:

* Navigate to http://xxyzzzq.github.io/sandbox/media-session/blob-icon-test.html
  and start playing media.
* Click "Choose File" to upload an image. The preferred image can be found at:
  http://xxyzzzq.github.io/sandbox/media-session/BLOB.png
* Observe the media notification. The icon should change.

BUG=616411
TEST=Manual
==========

to

==========
Allow Blob image src to be used as MediaNotification artwork

The ImageDownloader actually supports blob: scheme URLs, we should reduce the
restriction on MediaImage src to allow blob: URLs to be used.

Steps for testing:

* Navigate to http://xxyzzzq.github.io/sandbox/media-session/blob-icon-test.html
  and start playing media.
* Click "Choose File" to upload an image. The preferred image can be found at:
  http://xxyzzzq.github.io/sandbox/media-session/BLOB.png
* Observe the media notification. The icon should change.

BUG=616411
TEST=Manual

Committed: https://crrev.com/b025c5c637cde4d106038868eb5ad170ba168e66
Cr-Commit-Position: refs/heads/master@{#436668}
==========

[commit-bot: I haz the power, 2016-12-06 19:02:06]

Patchset 1 (id:??) landed as
https://crrev.com/b025c5c637cde4d106038868eb5ad170ba168e66
Cr-Commit-Position: refs/heads/master@{#436668}