Revert 11247, 11250, 11251 and 11279 to unblock DEPS roll (https://codereview.chromiu...

Revert 11247, 11250, 11251 and 11279 to unblock DEPS roll (https://codereview.chromium.org/24159002/)

11279 Sanitizing source files in Housekeeper-Nightly - https://code.google.com/p/skia/source/detail?r=11279
11251 More warnings as errors fixes - https://code.google.com/p/skia/source/detail?r=11251
11250 Warnings as errors fix - https://code.google.com/p/skia/source/detail?r=11250
11247 Initial error handling code - https://chromiumcodereview.appspot.com/23021015

git-svn-id: http://skia.googlecode.com/svn/trunk@11285 2bbb7eff-a529-9590-31e7-b0007b416f81