Rewrite gin/function_template.h to use C++11 variadic templates.

gin/array_buffer.h

Index: gin/array_buffer.h
diff --git a/gin/array_buffer.h b/gin/array_buffer.h
index 048a35fc61935478e61a3cf3b02010ac59579524..bb3f59ce0b1d4bbd19a3dfb23e639d930ee84fdd 100644
--- a/gin/array_buffer.h
+++ b/gin/array_buffer.h
@@ -26,6 +26,7 @@ class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
 class GIN_EXPORT ArrayBuffer {
  public:
   ArrayBuffer();
+  ArrayBuffer(const ArrayBuffer& other);
   ArrayBuffer(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> buffer);
   ~ArrayBuffer();
   ArrayBuffer& operator=(const ArrayBuffer& other);
@@ -39,8 +40,6 @@ class GIN_EXPORT ArrayBuffer {
   scoped_refptr<Private> private_;
   void* bytes_;
   size_t num_bytes_;
-
-  DISALLOW_COPY(ArrayBuffer);
 };
 
 template<>
@@ -52,6 +51,7 @@ struct GIN_EXPORT Converter<ArrayBuffer> {
 class GIN_EXPORT ArrayBufferView {
  public:
   ArrayBufferView();
+  ArrayBufferView(const ArrayBufferView& other);
   ArrayBufferView(v8::Isolate* isolate, v8::Handle<v8::ArrayBufferView> view);
   ~ArrayBufferView();
   ArrayBufferView& operator=(const ArrayBufferView& other);
@@ -65,8 +65,6 @@ class GIN_EXPORT ArrayBufferView {
   ArrayBuffer array_buffer_;
   size_t offset_;
   size_t num_bytes_;
-
-  DISALLOW_COPY(ArrayBufferView);
 };
 
 template<>