This bench attempts to recreate Chromium's Canvas_putImageData performance test to...

This bench attempts to recreate Chromium's Canvas_putImageData performance test to track down https://code.google.com/p/chromium/issues/detail?id=270649.

Cranking the repitition count up to 500 on a MacPro yields:

WITHOUT 10624:
running bench [640 480]            writepix_rgba_UPM  8888: cmsecs = 748.25   GPU: cmsecs = 225.95 gmsecs = 244.80
running bench [640 480]             writepix_rgba_PM  8888: cmsecs =  54.12   GPU: cmsecs = 225.77 gmsecs = 244.59

WITH 10624:
running bench [640 480]            writepix_rgba_UPM  8888: cmsecs = 747.70   GPU: cmsecs = 230.30 gmsecs = 249.51
running bench [640 480]             writepix_rgba_PM  8888: cmsecs =  55.05   GPU: cmsecs = 230.13 gmsecs = 249.38

R=bsalomon@google.com

Author: robertphillips@google.com

Review URL: https://chromiumcodereview.appspot.com/22895012

git-svn-id: http://skia.googlecode.com/svn/trunk@10761 2bbb7eff-a529-9590-31e7-b0007b416f81