Remove RenderThemeChromiumSkia.cpp explicitly from the mac build.
Remove RenderThemeChromiumSkia.cpp explicitly from the mac build.

This file does not build on a CoreGraphics platform, and isn't used by the mac build.  The explicit exclusion is needed because the Skia suffix doesn't match any of the platform regex exclusions.

Review URL: http://codereview.chromium.org/131024

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@18694 0039d316-1c4b-4281-b951-d872f2087c98

ropik/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,ropik/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,adobe/chromium,gavinp/chromium,ropik/chromium,ropik/chromium,yitian134/chromium