jankometer: Use the stub implementation for non-Windows.

jankometer: Use the stub implementation for non-Windows.

The jankometer implementation only does anything on Windows. So use
the stub implementation (used on mac, android) for linux-aura. Also,
remove the gtk related code from jankometer.cc, and rename it to
jankometer_win.cc to make it clear that it is used only on Windows.

BUG=358751
R=sky@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=261189

[sadrul, 2014-04-01 18:52:48]

jam@ Please review (I am not sure who a proper owner reviewer of this should be,
so picked at random. Please feel free to redirect as you see fit).

erg@ FYI

[jam, 2014-04-02 16:23:17]

On 2014/04/01 18:52:48, sadrul wrote:
> jam@ Please review (I am not sure who a proper owner reviewer of this should
be,
> so picked at random. Please feel free to redirect as you see fit).
> 
> erg@ FYI

can you pick another owner from src/chrome? i'm a bit overloaded now, thanks.

[sadrul, 2014-04-02 17:00:20]

On 2014/04/02 16:23:17, jam wrote:
> On 2014/04/01 18:52:48, sadrul wrote:
> > jam@ Please review (I am not sure who a proper owner reviewer of this should
> be,
> > so picked at random. Please feel free to redirect as you see fit).
> > 
> > erg@ FYI
> 
> can you pick another owner from src/chrome? i'm a bit overloaded now, thanks.

==> sky@

[sky, 2014-04-02 19:48:06]

LGTM

[sadrul, 2014-04-02 22:06:24]

Committed patchset #1 manually as r261189 (presubmit successful).