Switch SkAutoMalloc to SkAutoTMalloc to avoid cast

src/effects/SkColorCubeFilter.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorCubeFilter.h"
 #include "SkColorPriv.h"
 #include "SkOnce.h"
@@ skipping 81 matching lines @@
 }
 
 void SkColorCubeFilter::ColorCubeProcesingCache::initProcessingLuts(
     SkColorCubeFilter::ColorCubeProcesingCache* cache) {
     static const SkScalar inv8bit = SkScalarInvert(SkIntToScalar(255));
 
     // We need 256 int * 2 for fColorToIndex, so a total of 512 int.
     // We need 256 SkScalar * 2 for fColorToFactors and 256 SkScalar
     // for fColorToScalar, so a total of 768 SkScalar.
     cache->fLutStorage.reset(512 * sizeof(int) + 768 * sizeof(SkScalar));
-    uint8_t* storage = (uint8_t*)cache->fLutStorage.get();
+    uint8_t* storage = cache->fLutStorage.get();
     cache->fColorToIndex[0] = (int*)storage;
     cache->fColorToIndex[1] = cache->fColorToIndex[0] + 256;
     cache->fColorToFactors[0] = (SkScalar*)(storage + (512 * sizeof(int)));
     cache->fColorToFactors[1] = cache->fColorToFactors[0] + 256;
     cache->fColorToScalar = cache->fColorToFactors[1] + 256;
 
     SkScalar size = SkIntToScalar(cache->fCubeDimension);
     SkScalar scale = (size - SK_Scalar1) * inv8bit;
 
     for (int i = 0; i < 256; ++i) {
@@ skipping 215 matching lines @@
         if (textureCube) {
             context->textureProvider()->assignUniqueKeyToTexture(key, textureCube);
         } else {
             return nullptr;
         }
     }
 
     return GrColorCubeEffect::Create(textureCube);
 }
 #endif