Heavy cleanup of the external pointer API.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 51065aac41821a1c6b1e460d8dd716dee09f5143..95a33f90b4b6626a837d1306dd39515b036c4642 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -239,6 +239,9 @@ class Factory {
 
   Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
 
+  Handle<FixedArray> CopySizeFixedArray(Handle<FixedArray> array,
+                                        int new_length);
+
   Handle<FixedDoubleArray> CopyFixedDoubleArray(
       Handle<FixedDoubleArray> array);
 
@@ -325,6 +328,8 @@ class Factory {
 
   Handle<ScopeInfo> NewScopeInfo(int length);
 
+  Handle<JSObject> NewExternal(void* value);
+
   Handle<Code> NewCode(const CodeDesc& desc,
                        Code::Flags flags,
                        Handle<Object> self_reference,