switch over clip calls to use SkClipOp instead of SkRegion::Op

Change-Id: I67d23c487b5249bc31d96e3b2393f693c0b2bcff
diff --git a/libs/hwui/SkiaCanvasProxy.h b/libs/hwui/SkiaCanvasProxy.h
index 0111815..badcc1d 100644
--- a/libs/hwui/SkiaCanvasProxy.h
+++ b/libs/hwui/SkiaCanvasProxy.h
@@ -90,10 +90,10 @@
                              const SkPoint texCoords[4], SkBlendMode,
                              const SkPaint& paint) override;
 
-    virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) override;
-    virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) override;
-    virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) override;
-    virtual void onClipRegion(const SkRegion&, SkRegion::Op) override;
+    virtual void onClipRect(const SkRect&, SkClipOp, ClipEdgeStyle) override;
+    virtual void onClipRRect(const SkRRect&, SkClipOp, ClipEdgeStyle) override;
+    virtual void onClipPath(const SkPath&, SkClipOp, ClipEdgeStyle) override;
+    virtual void onClipRegion(const SkRegion&, SkClipOp) override;
 
 private:
     Canvas* mCanvas;