Every window opened generates a "The function ‘CGContextErase’ is obsolete" message in console

my Mac is running OSX Yosemite 10.10.2.

I recently found out that in my console such messages:

[A process name and its pid]: The function ‘CGContextErase’ is obsolete and will be removed in an upcoming update. Unfortunately, this application, or a library it uses, is using this obsolete function, and is thereby contributing to an overall degradation of system performance.

would occur for every window I opened.

I tried $ sample -e -wait [Application Name] then launch the application, but in the report I can't find any call to CGContextErase.

Is there anyway to reveal what is behind all this?

Following is a screenshot of Console messages filtered with word CGContextErase: