Changes to canvas_skia_skia.cc to match canvas_skia_linux.cc behavior.
Changes to canvas_skia_skia.cc to match canvas_skia_linux.cc behavior.

BUG=105550
TEST=Build aura with use_canvas_skia_skia=1 and check that UI looks the same.

Review URL: http://codereview.chromium.org/9290048

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@121721 0039d316-1c4b-4281-b951-d872f2087c98

yitian134/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium