SkBitmapRegionDecoder clean-up

tools/SkBitmapRegionDecoderInterface.h

Index: tools/SkBitmapRegionDecoderInterface.h
diff --git a/tools/SkBitmapRegionDecoderInterface.h b/tools/SkBitmapRegionDecoderInterface.h
index bc28c2b2af6f2710c8c2d94ef3a64abb45cbe2c2..047f023c808bd4a419befb5d98334e5990140ecd 100644
--- a/tools/SkBitmapRegionDecoderInterface.h
+++ b/tools/SkBitmapRegionDecoderInterface.h
@@ -56,6 +56,11 @@ public:
     virtual SkBitmap* decodeRegion(int start_x, int start_y, int width,
                                    int height, int sampleSize,
                                    SkColorType colorType) = 0;
+    /*
+     * @param  Requested destination color type
+     * @return true if we support the requested color type and false otherwise
+     */
+    virtual bool conversionSupported(SkColorType colorType) = 0;
 
     int width() const { return fWidth; }
     int height() const { return fHeight; }