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

Change-Id: I67d23c487b5249bc31d96e3b2393f693c0b2bcff
diff --git a/libs/hwui/SkiaCanvas.h b/libs/hwui/SkiaCanvas.h
index 4f1d857..9639ebd 100644
--- a/libs/hwui/SkiaCanvas.h
+++ b/libs/hwui/SkiaCanvas.h
@@ -92,9 +92,9 @@
     virtual bool quickRejectRect(float left, float top, float right, float bottom) const override;
     virtual bool quickRejectPath(const SkPath& path) const override;
     virtual bool clipRect(float left, float top, float right, float bottom,
-            SkRegion::Op op) override;
-    virtual bool clipPath(const SkPath* path, SkRegion::Op op) override;
-    virtual bool clipRegion(const SkRegion* region, SkRegion::Op op) override;
+            SkClipOp op) override;
+    virtual bool clipPath(const SkPath* path, SkClipOp op) override;
+    virtual bool clipRegion(const SkRegion* region, SkClipOp op) override;
 
     virtual SkDrawFilter* getDrawFilter() override;
     virtual void setDrawFilter(SkDrawFilter* drawFilter) override;
@@ -174,7 +174,7 @@
     void recordPartialSave(SaveFlags::Flags flags);
 
     template<typename T>
-    void recordClip(const T&, SkRegion::Op);
+    void recordClip(const T&, SkClipOp);
     void applyPersistentClips(size_t clipStartIndex);
 
     void drawPoints(const float* points, int count, const SkPaint& paint,