Support more debugger commands in the wire protocol

runtime/vm/os_win.cc

Index: runtime/vm/os_win.cc
===================================================================
--- runtime/vm/os_win.cc	(revision 7517)
+++ runtime/vm/os_win.cc	(working copy)
@@ -143,12 +143,6 @@
 }
 
 
-// TODO(asiva): Consider moving this to "globals.h".
-#ifndef va_copy
-#define va_copy(dst, src) (memmove(&(dst), &(src), sizeof(dst)))
-#endif  /* va_copy */
-
-
 int OS::VSNPrint(char* str, size_t size, const char* format, va_list args) {
   if (str == NULL || size == 0) {
     return _vscprintf(format, args);