Cast for fuzzer complaint

src/gpu/GrSurface.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrSurface.h"
 #include "GrContext.h"
 #include "GrSurfacePriv.h"
@@ skipping 11 matching lines @@
         // We own one color value for each MSAA sample.
         int colorValuesPerPixel = SkTMax(1, desc.fSampleCnt);
         if (desc.fSampleCnt) {
             // Worse case, we own the resolve buffer so that is one more sample per pixel.
             colorValuesPerPixel += 1;
         }
         SkASSERT(kUnknown_GrPixelConfig != desc.fConfig);
         SkASSERT(!GrPixelConfigIsCompressed(desc.fConfig));
         size_t colorBytes = GrBytesPerPixel(desc.fConfig);
         SkASSERT(colorBytes > 0);
-        size = colorValuesPerPixel * desc.fWidth * desc.fHeight * colorBytes;
+
+        size = (size_t) colorValuesPerPixel * desc.fWidth * desc.fHeight * colorBytes;
     } else {
         if (GrPixelConfigIsCompressed(desc.fConfig)) {
             size = GrCompressedFormatDataSize(desc.fConfig, desc.fWidth, desc.fHeight);
         } else {
             size = (size_t) desc.fWidth * desc.fHeight * GrBytesPerPixel(desc.fConfig);
         }
 
         size += size/3;  // in case we have to mipmap
     }
 
@@ skipping 144 matching lines @@
 
 void GrSurface::onRelease() {
     this->invokeReleaseProc();
     this->INHERITED::onRelease();
 }
 
 void GrSurface::onAbandon() {
     this->invokeReleaseProc();
     this->INHERITED::onAbandon();
 }