SkColorTable locking serves no purpose anymore.

src/core/SkProcSpriteBlitter.cpp

 
 /*
  * 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.
  */
 
 
 #if 0   // experimental
 
 class SkProcSpriteBlitter : public SkSpriteBlitter {
 public:
     typedef void (*Proc)(void* dst, const void* src, int count, const SkPMColor ctable[]);
 
     SkProcSpriteBlitter(const SkBitmap& source, Proc proc, unsigned srcShift, unsigned dstShift)
         : SkSpriteBlitter(source), fProc(proc), fSrcShift(SkToU8(srcShift)), fDstShift(SkToU8(dstShift)) {}
 
     virtual void blitRect(int x, int y, int width, int height)
     {
         size_t      dstRB = fDevice.rowBytes();
         size_t      srcRB = fSource.rowBytes();
         char*       dst = (char*)fDevice.getPixels() + y * dstRB + (x << fDstShift);
         const char* src = (const char*)fSource.getPixels() + (y - fTop) * srcRB + ((x - fLeft) << fSrcShift);
         Proc        proc = fProc;
         const SkPMColor* ctable = NULL;
 
         if fSource.getColorTable())
-            ctable = fSource.getColorTable()->lockColors();
+            ctable = fSource.getColorTable()->readColors();
 
         while (--height >= 0)
         {
             proc(dst, src, width, ctable);
             dst += dstRB;
             src += srcRB;
         }
-
-        if fSource.getColorTable())
-            fSource.getColorTable()->unlockColors();
     }
 
 private:
     Proc    fProc;
     uint8_t fSrcShift, fDstShift;
 };
 
 #endif