hide deviceproperties, prepare the way for surfaceprops

include/core/SkBitmapDevice.h

Index: include/core/SkBitmapDevice.h
diff --git a/include/core/SkBitmapDevice.h b/include/core/SkBitmapDevice.h
index f8ce93a9272e1cdaf2967cd01a077fef12bb98f5..39bbab63e548baff699aba19b3f33ea8d1238f18 100644
--- a/include/core/SkBitmapDevice.h
+++ b/include/core/SkBitmapDevice.h
@@ -22,16 +22,18 @@ public:
      *  any drawing to this device will have no effect.
     */
     SkBitmapDevice(const SkBitmap& bitmap);
-
+private:
     /**
      *  Construct a new device with the specified bitmap as its backend. It is
      *  valid for the bitmap to have no pixels associated with it. In that case,
      *  any drawing to this device will have no effect.
     */
     SkBitmapDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties);
-
-    static SkBitmapDevice* Create(const SkImageInfo&,
-                                  const SkDeviceProperties* = NULL);
+    static SkBitmapDevice* Create(const SkImageInfo&, const SkDeviceProperties*);
+public:
+    static SkBitmapDevice* Create(const SkImageInfo& info) {
+        return Create(info, NULL);
+    }
 
     virtual SkImageInfo imageInfo() const SK_OVERRIDE;