Optimize CSS box-shadow performance

src/core/SkScalerContext.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.
  */
 
 
 #include "SkScalerContext.h"
@@ skipping 593 matching lines @@
             }
 
             // clean out our glyph, since it may be larger than dstM
             //sk_bzero(dst, height * dstRB);
 
             while (--height >= 0) {
                 memcpy(dst, src, width);
                 src += srcRB;
                 dst += dstRB;
             }
-            SkMask::FreeImage(dstM.fImage);
 
             if (fPreBlendForFilter.isApplicable()) {
                 applyLUTToA8Mask(srcM, fPreBlendForFilter.fG);
             }
         }
     }
 }
 
 void SkScalerContext::getPath(const SkGlyph& glyph, SkPath* path) {
     this->internalGetPath(glyph, NULL, path, NULL);
@@ skipping 167 matching lines @@
 SkScalerContext* SkTypeface::createScalerContext(const SkDescriptor* desc,
                                                  bool allowFailure) const {
     SkScalerContext* c = this->onCreateScalerContext(desc);
 
     if (!c && !allowFailure) {
         c = SkNEW_ARGS(SkScalerContext_Empty,
                        (const_cast<SkTypeface*>(this), desc));
     }
     return c;
 }