Allow toString capability to be toggled independent of developer mode

src/effects/SkStippleMaskFilter.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkStippleMaskFilter.h"
 #include "SkString.h"
 
@@ skipping 27 matching lines @@
                 scanline[x] = srcScanLine[x] && ((x+y) & 0x1) ? 0xFF : 0x00;
             }
             scanline += dst->fRowBytes;
             srcScanLine += src.fRowBytes;
         }
     }
 
     return true;
 }
 
-#ifdef SK_DEVELOPER
+#ifndef SK_IGNORE_TO_STRING
 void SkStippleMaskFilter::toString(SkString* str) const {
     str->append("SkStippleMaskFilter: ()");
 }
 #endif