remove unused SkBitmap::scrollRect API

include/core/SkBitmap.h

 /*
  * Copyright 2006 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 SkBitmap_DEFINED
 #define SkBitmap_DEFINED
 
@@ skipping 475 matching lines @@
     }
 
     /**
      *  Fill the specified area of this bitmap with the specified color.
      *  If the bitmap's colortype does not support alpha (e.g. 565) then the alpha
      *  of the color is ignored (treated as opaque). If the colortype only supports
      *  alpha (e.g. A1 or A8) then the color's r,g,b components are ignored.
      */
     void eraseArea(const SkIRect& area, SkColor c) const;
 
-    /** Scroll (a subset of) the contents of this bitmap by dx/dy. If there are
-        no pixels allocated (i.e. getPixels() returns null) the method will
-        still update the inval region (if present). If the bitmap is immutable,
-        do nothing and return false.
-
-        @param subset The subset of the bitmap to scroll/move. To scroll the
-                      entire contents, specify [0, 0, width, height] or just
-                      pass null.
-        @param dx The amount to scroll in X
-        @param dy The amount to scroll in Y
-        @param inval Optional (may be null). Returns the area of the bitmap that
-                     was scrolled away. E.g. if dx = dy = 0, then inval would
-                     be set to empty. If dx >= width or dy >= height, then
-                     inval would be set to the entire bounds of the bitmap.
-        @return true if the scroll was doable. Will return false if the colortype is kUnkown or
-                     if the bitmap is immutable.
-                     If no pixels are present (i.e. getPixels() returns false)
-                     inval will still be updated, and true will be returned.
-    */
-    bool scrollRect(const SkIRect* subset, int dx, int dy,
-                    SkRegion* inval = NULL) const;
-
     /**
      *  Return the SkColor of the specified pixel.  In most cases this will
      *  require un-premultiplying the color.  Alpha only colortypes (e.g. kAlpha_8_SkColorType)
      *  return black with the appropriate alpha set.  The value is undefined
      *  for kUnknown_SkColorType or if x or y are out of bounds, or if the bitmap
      *  does not have any pixels (or has not be locked with lockPixels()).
      */
     SkColor getColor(int x, int y) const;
 
     /** Returns the address of the specified pixel. This performs a runtime
@@ skipping 280 matching lines @@
 
 inline SkPMColor SkBitmap::getIndex8Color(int x, int y) const {
     SkASSERT(fPixels);
     SkASSERT(kIndex_8_SkColorType == this->colorType());
     SkASSERT((unsigned)x < (unsigned)this->width() && (unsigned)y < (unsigned)this->height());
     SkASSERT(fColorTable);
     return (*fColorTable)[*((const uint8_t*)fPixels + y * fRowBytes + x)];
 }
 
 #endif