Make mojo::internal::Buffer a non-virtual class.

mojo/public/cpp/bindings/lib/serialization.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_SERIALIZATION_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_SERIALIZATION_H_
 
 #include <string.h>
 
 #include "mojo/public/cpp/bindings/array_traits_carray.h"
 #include "mojo/public/cpp/bindings/array_traits_standard.h"
 #include "mojo/public/cpp/bindings/array_traits_stl.h"
 #include "mojo/public/cpp/bindings/lib/array_serialization.h"
-#include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
+#include "mojo/public/cpp/bindings/lib/buffer.h"
 #include "mojo/public/cpp/bindings/lib/handle_interface_serialization.h"
 #include "mojo/public/cpp/bindings/lib/map_serialization.h"
 #include "mojo/public/cpp/bindings/lib/native_enum_serialization.h"
 #include "mojo/public/cpp/bindings/lib/native_struct_serialization.h"
 #include "mojo/public/cpp/bindings/lib/string_serialization.h"
 #include "mojo/public/cpp/bindings/lib/template_util.h"
 #include "mojo/public/cpp/bindings/map_traits_standard.h"
 #include "mojo/public/cpp/bindings/map_traits_stl.h"
 #include "mojo/public/cpp/bindings/string_traits_standard.h"
 #include "mojo/public/cpp/bindings/string_traits_stl.h"
@@ skipping 21 matching lines @@
   // result buffer is not properly aligned, we have to do an extra copy. In
   // practice, this should never happen for mojo::Array (backed by std::vector).
   bool need_copy = !IsAligned(result_buffer);
 
   if (need_copy) {
     // calloc sets the memory to all zero.
     result_buffer = calloc(size, 1);
     DCHECK(IsAligned(result_buffer));
   }
 
-  FixedBuffer buffer;
+  Buffer buffer;
   buffer.Initialize(result_buffer, size);
   typename MojomType::Struct::Data_* data = nullptr;
   Serialize<MojomType>(*input, &buffer, &data, &context);
 
   if (need_copy) {
     memcpy(&result.front(), result_buffer, size);
     free(result_buffer);
   }
 
   return result;
@@ skipping 33 matching lines @@
   if (need_copy)
     free(input_buffer);
 
   return result;
 }
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_SERIALIZATION_H_