Various extension-related cleanup and simplifications.

src/extensions/free-buffer-extension.cc

Index: src/extensions/free-buffer-extension.cc
diff --git a/src/extensions/free-buffer-extension.cc b/src/extensions/free-buffer-extension.cc
index c2e31028bdab77ede0316e1b49f09c92a9aa832a..b4abaafe237aec39a0a1183cd20f244fd0eca5e8 100644
--- a/src/extensions/free-buffer-extension.cc
+++ b/src/extensions/free-buffer-extension.cc
@@ -47,14 +47,4 @@ void FreeBufferExtension::FreeBuffer(
   V8::ArrayBufferAllocator()->Free(contents.Data(), contents.ByteLength());
 }
 
-
-void FreeBufferExtension::Register() {
-  static char buffer[100];
-  Vector<char> temp_vector(buffer, sizeof(buffer));
-  OS::SNPrintF(temp_vector, "native function freeBuffer();");
-
-  static FreeBufferExtension buffer_free_extension(buffer);
-  static v8::DeclareExtension declaration(&buffer_free_extension);
-}
-
 } }  // namespace v8::internal