BUG=skia:
Review URL: https://codereview.chromium.org/
781593002
virtual void setMatrixClip(const SkMatrix&, const SkRegion&,
const SkClipStack&) {};
+private:
/** Clears the entire device to the specified color (including alpha).
* Ignores the clip.
*/
virtual void clear(SkColor color) = 0;
+public:
/** These are called inside the per-device-layer loop for each draw call.
When these are called, we have already applied any saveLayer operations,