Switch SkAutoMalloc to SkAutoTMalloc to avoid cast

gm/etc1bitmap.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 "gm.h"
 
 #include "Resources.h"
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkImageGenerator.h"
 #include "SkImageDecoder.h"
 #include "SkOSFile.h"
+#include "SkTemplates.h"
 
 #ifndef SK_IGNORE_ETC1_SUPPORT
 
 #include "etc1.h"
 
 /**
  *  Remove the last row and column of ETC1 blocks, effectively
  *  making a texture that started as power of two into a texture
  *  that is no longer power of two...
  */
@@ skipping 13 matching lines @@
 
     // Make sure that we have blocks to trim off..
     if (blockWidth < 2 || blockHeight < 2) {
         return false;
     }
 
     int newWidth = (blockWidth - 1) << 2;
     int newHeight = (blockHeight - 1) << 2;
 
     size_t newDataSz = etc1_get_encoded_data_size(newWidth, newHeight) + ETC_PKM_HEADER_SIZE;
-    SkAutoMalloc am(newDataSz);
+    SkAutoTMalloc<etc1_byte> am(newDataSz);
 
-    etc1_byte *newData = reinterpret_cast<etc1_byte *>(am.get());
+    etc1_byte* newData = am.get();
 
     etc1_pkm_format_header(newData, newWidth, newHeight);
     newData += ETC_PKM_HEADER_SIZE;
     origData += ETC_PKM_HEADER_SIZE;
 
     for (int j = 0; j < blockHeight - 1; ++j) {
         memcpy(newData, origData, (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE);
         origData += blockWidth*ETC1_ENCODED_BLOCK_SIZE;
         newData += (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE;
     }
@@ skipping 149 matching lines @@
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new skiagm::ETC1Bitmap_PKM_GM;)
 DEF_GM(return new skiagm::ETC1Bitmap_KTX_GM;)
 DEF_GM(return new skiagm::ETC1Bitmap_R11_KTX_GM;)
 
 #ifndef SK_IGNORE_ETC1_SUPPORT
 DEF_GM(return new skiagm::ETC1Bitmap_NPOT_GM;)
 #endif  // SK_IGNORE_ETC1_SUPPORT