Commits
Leon Scroggins III authored and Derek Sollenberger committed 247dc6e1257
Fix use of SkMutex. Recent change to Skia moved SkMutex into its own header file. Include it to use and SkMutex. Use SK_DECLARE_STATIC_MUTEX to remove static initializer/finalizer. Fixes master-skia build. Change-Id: I2ab43c511587167b81310d5d55a65604d82761f5