Guard against most unintentionally ephemeral SkAutoFoo instantiations.

src/core/SkDescriptor.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkDescriptor_DEFINED
@@ skipping 141 matching lines @@
 private:
     enum {
         kStorageSize =  sizeof(SkDescriptor)
                         + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContext::Rec)    // for rec
                         + sizeof(SkDescriptor::Entry) + sizeof(void*)                   // for typeface
                         + 32   // slop for occational small extras
     };
     SkDescriptor*   fDesc;
     uint32_t        fStorage[(kStorageSize + 3) >> 2];
 };
+#define SkAutoDescriptor(...) SK_REQUIRE_LOCAL_VAR(SkAutoDescriptor)
 
 
 #endif