Roll back the changes I made in r193907 which created a new Frame
pure virtual base class and made StackFrame a subclass of that.  As
I started to build on top of that arrangement today, I found that it
wasn't working out like I intended.  Instead I'll try sticking with
the single StackFrame class -- there's too much code duplication to
make a more complicated class hierarchy sensible I think.

llvm-svn: 193983
diff --git a/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
index eda801c..7dc373f 100644
--- a/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
+++ b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
@@ -39,7 +39,7 @@
     GetRegisterContext ();
 
     virtual lldb::RegisterContextSP
-    CreateRegisterContextForFrame (lldb_private::Frame *frame);
+    CreateRegisterContextForFrame (lldb_private::StackFrame *frame);
 
     void
     Dump (lldb_private::Log *log, uint32_t index);