Switch SkAutoMalloc to SkAutoTMalloc to avoid cast

src/codec/SkJpegCodec.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCodec.h"
 #include "SkJpegCodec.h"
 #include "SkJpegDecoderMgr.h"
@@ skipping 332 matching lines @@
                 srcConfig = SkSwizzler::kRGB_565;
                 break;
             default:
                 // This function should only be called if the colorType is supported by jpeg
                 SkASSERT(false);
         }
     }
 
     fSwizzler.reset(SkSwizzler::CreateSwizzler(srcConfig, nullptr, dstInfo, options));
     fStorage.reset(get_row_bytes(fDecoderMgr->dinfo()));
-    fSrcRow = static_cast<uint8_t*>(fStorage.get());
+    fSrcRow = fStorage.get();
 }
 
 SkSampler* SkJpegCodec::getSampler(bool createIfNecessary) {
     if (!createIfNecessary || fSwizzler) {
-        SkASSERT(!fSwizzler || (fSrcRow && static_cast<uint8_t*>(fStorage.get()) == fSrcRow));
+        SkASSERT(!fSwizzler || (fSrcRow && fStorage.get() == fSrcRow));
         return fSwizzler;
     }
 
     this->initializeSwizzler(this->dstInfo(), this->options());
     return fSwizzler;
 }
 
 SkCodec::Result SkJpegCodec::onStartScanlineDecode(const SkImageInfo& dstInfo,
         const Options& options, SkPMColor ctable[], int* ctableCount) {
     // Set the jump location for libjpeg errors
@@ skipping 57 matching lines @@
         } else {
             dstRow = SkTAddOffset<JSAMPLE>(dstRow, rowBytes);
         }
     }
     return count;
 }
 
 #ifndef TURBO_HAS_SKIP
 // TODO (msarett): Avoid reallocating the memory buffer on each call to skip.
 static uint32_t jpeg_skip_scanlines(jpeg_decompress_struct* dinfo, int count) {
-    SkAutoMalloc storage(get_row_bytes(dinfo));
-    uint8_t* storagePtr = static_cast<uint8_t*>(storage.get());
+    SkAutoTMalloc<uint8_t> storage(get_row_bytes(dinfo));
+    uint8_t* storagePtr = storage.get();
     for (int y = 0; y < count; y++) {
         if (1 != jpeg_read_scanlines(dinfo, &storagePtr, 1)) {
             return y;
         }
     }
     return count;
 }
 #endif
 
 bool SkJpegCodec::onSkipScanlines(int count) {
     // Set the jump location for libjpeg errors
     if (setjmp(fDecoderMgr->getJmpBuf())) {
         return fDecoderMgr->returnFalse("setjmp");
     }
 
     return (uint32_t) count == jpeg_skip_scanlines(fDecoderMgr->dinfo(), count);
 }