Add layout tests for seeks to zero on streaming sources.

Add layout tests for seeks to zero on streaming sources.

Adds testing for the Chrome side patch:
https://codereview.chromium.org/621573002

BUG=412562
TEST=all tests!

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=183373

[DaleCurtis, 2014-10-01 00:07:52]

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

[philipj_slow, 2014-10-01 10:47:19]

LGTM % nits

I've verified that the test fails without
https://codereview.chromium.org/621573002 and passes with it, so if there's no
policy in the way you can land the Chromium side first and then this CL.

https://codereview.chromium.org/615193004/diff/1/LayoutTests/http/tests/media...
File
LayoutTests/http/tests/media/audio-seekable-contains-zero-without-ranges.html
(right):

https://codereview.chromium.org/615193004/diff/1/LayoutTests/http/tests/media...
LayoutTests/http/tests/media/audio-seekable-contains-zero-without-ranges.html:19:
audio.currentTime = 1;
Per spec you should be able to assert_equals(audio.currentTime, 1) after this,
to verify that the clamping does not take effect until the seek has finished.
However, that assert would fail. Just and FYI, if it already worked I would
suggest adding the assert, but it's not worth using this test to track that bug.

https://codereview.chromium.org/615193004/diff/1/LayoutTests/http/tests/media...
File LayoutTests/http/tests/media/resources/serve-video.php (right):

https://codereview.chromium.org/615193004/diff/1/LayoutTests/http/tests/media...
LayoutTests/http/tests/media/resources/serve-video.php:28:
header("Content-Range: bytes " . $start . "-" . $end . "/" . $fileSize);
Can you replace the tabs with spaces? You didn't add them, but now it's more
obvious.

[DaleCurtis, 2014-10-07 23:27:58]

Will land this once Blink bots have had a chance to pick up the Chromium side
change.

https://codereview.chromium.org/615193004/diff/1/LayoutTests/http/tests/media...
File LayoutTests/http/tests/media/resources/serve-video.php (right):

https://codereview.chromium.org/615193004/diff/1/LayoutTests/http/tests/media...
LayoutTests/http/tests/media/resources/serve-video.php:28:
header("Content-Range: bytes " . $start . "-" . $end . "/" . $fileSize);
On 2014/10/01 10:47:18, philipj wrote:
> Can you replace the tabs with spaces? You didn't add them, but now it's more
> obvious.

Done.

[DaleCurtis, 2014-10-07 23:42:52]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2014-10-07 23:42:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/615193004/20001

[commit-bot: I haz the power, 2014-10-08 02:52:19]

Committed patchset #2 (id:20001) as 183373