Add drawBitmapLattice() API

src/core/SkNinePatchIter.h

Index: src/core/SkNinePatchIter.h
diff --git a/src/core/SkNinePatchIter.h b/src/core/SkNinePatchIter.h
index df06c1f630215637e5e005ebf230f491191517f5..54dfee6140b31ec70907a155b6a03064a10a0afb 100644
--- a/src/core/SkNinePatchIter.h
+++ b/src/core/SkNinePatchIter.h
@@ -8,7 +8,9 @@
 #ifndef SkNinePatchIter_DEFINED
 #define SkNinePatchIter_DEFINED
 
+#include "SkCanvas.h"
 #include "SkScalar.h"
+#include "SkTArray.h"
 
 struct SkIRect;
 struct SkRect;
@@ -18,6 +20,12 @@ struct SkRect;
  */
 class SkNinePatchIter {
 public:
+
+    static bool Valid(int imageWidth, int imageHeight, const SkCanvas::NinePatchDivs& divs);
+
+    SkNinePatchIter(int imageWidth, int imageHeight, const SkCanvas::NinePatchDivs& divs,
+                    const SkRect& dst);
+
     static bool Valid(int imageWidth, int imageHeight, const SkIRect& center);
 
     SkNinePatchIter(int imageWidth, int imageHeight, const SkIRect& center, const SkRect& dst);
@@ -28,10 +36,10 @@ public:
     bool next(SkRect* src, SkRect* dst);
 
 private:
-    SkScalar fSrcX[4];
-    SkScalar fSrcY[4];
-    SkScalar fDstX[4];
-    SkScalar fDstY[4];
+    SkTArray<SkScalar> fSrcX;
+    SkTArray<SkScalar> fSrcY;
+    SkTArray<SkScalar> fDstX;
+    SkTArray<SkScalar> fDstY;
 
     int fCurrX;
     int fCurrY;