eliminate config param -- it was always self's config

include/core/SkPixelRef.h

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPixelRef_DEFINED
 #define SkPixelRef_DEFINED
 
@@ skipping 205 matching lines @@
     }
 
     /** Are we really wrapping a texture instead of a bitmap?
      */
     virtual GrTexture* getTexture() { return NULL; }
 
     bool readPixels(SkBitmap* dst, const SkIRect* subset = NULL);
 
     /**
      *  Makes a deep copy of this PixelRef, respecting the requested config.
-     *  @param config Desired config.
      *  @param subset Subset of this PixelRef to copy. Must be fully contained within the bounds of
      *         of this PixelRef.
      *  @return A new SkPixelRef, or NULL if either there is an error (e.g. the destination could
      *          not be created with the given config), or this PixelRef does not support deep
      *          copies.
      */
-    virtual SkPixelRef* deepCopy(SkBitmap::Config config, const SkIRect* subset = NULL) {
+    virtual SkPixelRef* deepCopy(const SkIRect* subset = NULL) {
         return NULL;
     }
 
 #ifdef SK_BUILD_FOR_ANDROID
     /**
      *  Acquire a "global" ref on this object.
      *  The default implementation just calls ref(), but subclasses can override
      *  this method to implement additional behavior.
      */
     virtual void globalRef(void* data=NULL);
@@ skipping 127 matching lines @@
     /**
      *  Allocate a new pixelref matching the specified ImageInfo, allocating
      *  the memory for the pixels. If the ImageInfo requires a ColorTable,
      *  the pixelref will ref() the colortable.
      *  On failure return NULL.
      */
     virtual SkPixelRef* create(const SkImageInfo&, SkColorTable*) = 0;
 };
 
 #endif