[Telemetry] Some fixups in speed index calculation.

[Telemetry] Some fixups in speed index calculation.

1. zIndex is case sensitive. Page contents were bleeding through on some pages.
2. With android screen capture compression artifacts, a slightly higher
   tolerance was needed.
3. The assert was wrong. We need to make sure the whole bounding box is filled.
   It doesn't matter what percent of the overall video is the bounding box.

BUG=323813
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=244384

[szym, 2014-01-09 19:37:31]

lgtm

https://codereview.chromium.org/127373003/diff/1/tools/telemetry/telemetry/co...
File tools/telemetry/telemetry/core/platform/android_platform_backend.py
(right):

https://codereview.chromium.org/127373003/diff/1/tools/telemetry/telemetry/co...
tools/telemetry/telemetry/core/platform/android_platform_backend.py:226: output
= ''
I'm surprised I didn't catch that in my earlier testing.

[tonyg, 2014-01-09 19:39:21]

https://codereview.chromium.org/127373003/diff/1/tools/telemetry/telemetry/co...
File tools/telemetry/telemetry/core/platform/android_platform_backend.py
(right):

https://codereview.chromium.org/127373003/diff/1/tools/telemetry/telemetry/co...
tools/telemetry/telemetry/core/platform/android_platform_backend.py:226: output
= ''
On 2014/01/09 19:37:31, szym wrote:
> I'm surprised I didn't catch that in my earlier testing.

Not really a bug, just makes the assert more useful. It hit once, but hasn't hit
again for me since I added the better message.

[commit-bot: I haz the power, 2014-01-11 02:00:59]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tonyg@chromium.org/127373003/70001

[commit-bot: I haz the power, 2014-01-11 05:48:52]

Retried try job too often on win_rel for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2014-01-11 15:05:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tonyg@chromium.org/127373003/70001

[commit-bot: I haz the power, 2014-01-11 23:09:55]

Change committed as 244384