Replaces Location::ToStackSlotAddress() with Location::ToStackSlotOffset()

runtime/vm/assembler_x64.cc

Index: runtime/vm/assembler_x64.cc
===================================================================
--- runtime/vm/assembler_x64.cc	(revision 25072)
+++ runtime/vm/assembler_x64.cc	(working copy)
@@ -65,6 +65,13 @@
 #undef __
 
 
+Address Address::StackSlotAddress(const Location& stack_slot) {
+  ASSERT(stack_slot.IsStackSlot() || stack_slot.IsDoubleStackSlot() ||
+         stack_slot.IsQuadStackSlot());
+  return Address(RBP, stack_slot.ToStackSlotOffset());
+}
+
+
 void Assembler::InitializeMemoryWithBreakpoints(uword data, int length) {
   memset(reinterpret_cast<void*>(data), Instr::kBreakPointInstruction, length);
 }