Add optional overdraw parameter to skia benchmarking extension

Add optional overdraw parameter to skia benchmarking extension

This change adds another optional parameter 'overdraw' to the rasterize
method of the skia benchmarking extension. When set to true an image
with pixel overdraw visualized as heat map is returned.

BUG=268342
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=215876

[egraether, 2013-08-05 14:06:28]

Please take a look.

[f(malita), 2013-08-05 14:20:47]

LGTM. I think you'll need a content owner to rubber stamp this too.

[egraether, 2013-08-05 14:31:00]

On 2013/08/05 14:20:47, Florin Malita wrote:
> LGTM. I think you'll need a content owner to rubber stamp this too.

Thanks! Can you suggest a content owner please?

[f(malita), 2013-08-05 14:37:44]

On 2013/08/05 14:31:00, egraether wrote:
> On 2013/08/05 14:20:47, Florin Malita wrote:
> > LGTM. I think you'll need a content owner to rubber stamp this too.
> 
> Thanks! Can you suggest a content owner please?

I've been bugging piman with skia_benchmarking_extension reviews, so he's
probably the best pick since he's familiar with the context.

[egraether, 2013-08-05 14:46:03]

+piman, can you take a look as well please?

[piman, 2013-08-05 20:27:22]

lgtm

[commit-bot: I haz the power, 2013-08-06 09:39:08]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/egraether@chromium.org/22202003/8001

[commit-bot: I haz the power, 2013-08-06 11:46:14]

Change committed as 215876