Fix power measurement with dumpsys when the format is unrecognized.

Fix power measurement with dumpsys when the format is unrecognized.

dumpsys information for older release of android doesn't contain the
needed information. This CL prevent the application to crash in that
case.

BUG=359883
TBR=tonyg@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=261708

[qsr, 2014-04-04 08:33:20]

Committed patchset #1 manually as r261708 (presubmit successful).

[nhiroki, 2014-04-04 10:22:25]

A revert of this CL has been created in
https://codereview.chromium.org/225683002/ by nhiroki@chromium.org.

The reason for reverting is: This seems to break telemetry_unittests on Mac and
Linux.

http://build.chromium.org/p/chromium.mac/builders/Mac10.7%20Tests%20%283%29/b...
http://build.chromium.org/p/chromium.linux/buildstatus?builder=Linux%20Tests&....

[Nikita (slow), 2014-04-04 10:23:02]

On 2014/04/04 08:33:20, qsr wrote:
> Committed patchset #1 manually as r261708 (presubmit successful).

No trybots? Why?

This breaks buildbots (and trybots)
http://goo.gl/a2DGKW
http://goo.gl/FX2KBP
http://goo.gl/6vvIHR

[Nikita (slow), 2014-04-04 10:23:23]

A revert of this CL has been created in
https://codereview.chromium.org/225693002/ by nkostylev@chromium.org.

The reason for reverting is: Breaks buildbots (and trybots)
http://goo.gl/a2DGKW
http://goo.gl/FX2KBP
http://goo.gl/6vvIHR.

[qsr, 2014-04-04 10:48:27]

On 2014/04/04 10:23:23, Nikita Kostylev wrote:
> A revert of this CL has been created in
> https://codereview.chromium.org/225693002/ by mailto:nkostylev@chromium.org.
> 
> The reason for reverting is: Breaks buildbots (and trybots)
> http://goo.gl/a2DGKW
> http://goo.gl/FX2KBP
> http://goo.gl/6vvIHR.

 A stupid one -> this was to fix the perf waterfall...