remvoe duplicate impl for SkImageInfo flattening

src/image/SkSurface_Raster.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 "SkSurface_Base.h"
 #include "SkImagePriv.h"
 #include "SkCanvas.h"
@@ skipping 137 matching lines @@
     }
 
     return SkNEW_ARGS(SkSurface_Raster, (info, pixels, rowBytes));
 }
 
 SkSurface* SkSurface::NewRaster(const SkImageInfo& info) {
     if (!SkSurface_Raster::Valid(info)) {
         return NULL;
     }
 
-    static const size_t kMaxTotalSize = SK_MaxS32;
-    size_t rowBytes = SkImageMinRowBytes(info);
-    uint64_t size64 = (uint64_t)info.fHeight * rowBytes;
-    if (size64 > kMaxTotalSize) {
+    SkAutoTUnref<SkPixelRef> pr(SkMallocPixelRef::NewAllocate(info, 0, NULL));
+    if (NULL == pr.get()) {
         return NULL;
     }
-
-    size_t size = (size_t)size64;
-    void* pixels = sk_malloc_throw(size);
-    if (NULL == pixels) {
-        return NULL;
-    }
-
-    SkAutoTUnref<SkPixelRef> pr(SkNEW_ARGS(SkMallocPixelRef, (pixels, size, NULL, true)));
-    return SkNEW_ARGS(SkSurface_Raster, (info, pr, rowBytes));
+    return SkNEW_ARGS(SkSurface_Raster, (info, pr, info.minRowBytes()));
 }