flag to make kClipToLayer_SaveFlag the default behavior

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index a987708c4216683e9d5bd2d4ce7a1b588269ab95..0bf531da0cc6f5c5b41261db1f840a683644dead 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -18,6 +18,10 @@
 #include "SkRegion.h"
 #include "SkXfermode.h"
 
+// if not defined, we always assume ClipToLayer for saveLayer()
+//#define SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
+
+
 //#define SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG
 
 class SkBounder;
@@ -328,7 +332,9 @@ public:
 
         // helper masks for common choices
         kMatrixClip_SaveFlag        = 0x03,
+#ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
         kARGB_NoClipLayer_SaveFlag  = 0x0F,
+#endif
         kARGB_ClipLayer_SaveFlag    = 0x1F
     };