Reverting r12665 & r12666 (Remove duplicate impl for SkImageInfo flattening) due to Chromium/Blink compilation errors

https://codereview.chromium.org/112603003/



git-svn-id: http://skia.googlecode.com/svn/trunk@12667 2bbb7eff-a529-9590-31e7-b0007b416f81
36 files changed