move GrMalloc, GrFree, Gr_bzero to their sk equivalents

src/gpu/GrPlotMgr.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrPlotMgr_DEFINED
 #define GrPlotMgr_DEFINED
 
@@ skipping 14 matching lines @@
         this->reset();
     }
 
     ~GrPlotMgr() {
         if (fBusy != fStorage) {
             delete[] fBusy;
         }
     }
 
     void reset() {
-        Gr_bzero(fBusy, fDim.fX * fDim.fY);
+        sk_bzero(fBusy, fDim.fX * fDim.fY);
     }
 
     bool newPlot(GrIPoint16* loc) {
         char* busy = fBusy;
         for (int y = 0; y < fDim.fY; y++) {
             for (int x = 0; x < fDim.fX; x++) {
                 if (!*busy) {
                     *busy = true;
                     loc->set(x, y);
                     return true;
@@ skipping 19 matching lines @@
 private:
     enum {
         STORAGE = 64
     };
     char fStorage[STORAGE];
     char* fBusy;
     GrIPoint16  fDim;
 };
 
 #endif