add src-rect-constraint to drawImageRect

src/core/SkBitmapDevice.cpp

Index: src/core/SkBitmapDevice.cpp
diff --git a/src/core/SkBitmapDevice.cpp b/src/core/SkBitmapDevice.cpp
index b94daef41e635338888c1fd06dec7a394dcdde2b..388708d4751407a0097cc9b960226114f9801ba4 100644
--- a/src/core/SkBitmapDevice.cpp
+++ b/src/core/SkBitmapDevice.cpp
@@ -237,8 +237,7 @@ void SkBitmapDevice::drawBitmap(const SkDraw& draw, const SkBitmap& bitmap,
 
 void SkBitmapDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
                                     const SkRect* src, const SkRect& dst,
-                                    const SkPaint& paint,
-                                    SkCanvas::DrawBitmapRectFlags flags) {
+                                    const SkPaint& paint, SK_VIRTUAL_CONSTRAINT_TYPE) {
     SkMatrix    matrix;
     SkRect      bitmapBounds, tmpSrc, tmpDst;
     SkBitmap    tmpBitmap;