use colortype instead of config

clone of https://codereview.chromium.org/305133006/

TBR=

BUG=skia:

Author: reed@google.com

Review URL: https://codereview.chromium.org/301233011
diff --git a/src/utils/debugger/SkObjectParser.h b/src/utils/debugger/SkObjectParser.h
index 911b778..da84265 100644
--- a/src/utils/debugger/SkObjectParser.h
+++ b/src/utils/debugger/SkObjectParser.h
@@ -20,7 +20,7 @@
 public:
 
     /**
-        Returns a string about a bitmaps bounds and config.
+        Returns a string about a bitmaps bounds and colortype.
         @param bitmap  SkBitmap
     */
     static SkString* BitmapToString(const SkBitmap& bitmap);