Provide a convenience array buffer allocator

samples/process.cc

Index: samples/process.cc
diff --git a/samples/process.cc b/samples/process.cc
index 54c8376e051f8010d690349ee6a8e556594bb8db..29ddb5cf2f187c4c346ac1e633f923c0f78388f4 100644
--- a/samples/process.cc
+++ b/samples/process.cc
@@ -38,17 +38,6 @@
 using namespace std;
 using namespace v8;
 
-class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
- public:
-  virtual void* Allocate(size_t length) {
-    void* data = AllocateUninitialized(length);
-    return data == NULL ? data : memset(data, 0, length);
-  }
-  virtual void* AllocateUninitialized(size_t length) { return malloc(length); }
-  virtual void Free(void* data, size_t) { free(data); }
-};
-
-
 // These interfaces represent an existing request processing interface.
 // The idea is to imagine a real application that uses these interfaces
 // and then add scripting capabilities that allow you to interact with
@@ -699,9 +688,9 @@ int main(int argc, char* argv[]) {
     fprintf(stderr, "No script was specified.\n");
     return 1;
   }
-  ArrayBufferAllocator array_buffer_allocator;
   Isolate::CreateParams create_params;
-  create_params.array_buffer_allocator = &array_buffer_allocator;
+  create_params.array_buffer_allocator =
+      v8::ArrayBuffer::Allocator::NewDefaultAllocator();
   Isolate* isolate = Isolate::New(create_params);
   Isolate::Scope isolate_scope(isolate);
   HandleScope scope(isolate);