Revert r7504....

src/frames-inl.h

Index: src/frames-inl.h
===================================================================
--- src/frames-inl.h	(revision 7504)
+++ src/frames-inl.h	(working copy)
@@ -148,26 +148,15 @@
 }
 
 
-Address JavaScriptFrame::GetParameterSlot(int index) const {
-  int param_count = ComputeParametersCount();
-  ASSERT(-1 <= index && index < param_count);
-  int parameter_offset = (param_count - index - 1) * kPointerSize;
-  return caller_sp() + parameter_offset;
-}
-
-
-Object* JavaScriptFrame::GetParameter(int index) const {
-  return Memory::Object_at(GetParameterSlot(index));
-}
-
-
 inline Object* JavaScriptFrame::receiver() const {
-  return GetParameter(-1);
+  const int offset = JavaScriptFrameConstants::kReceiverOffset;
+  return Memory::Object_at(caller_sp() + offset);
 }
 
 
 inline void JavaScriptFrame::set_receiver(Object* value) {
-  Memory::Object_at(GetParameterSlot(-1)) = value;
+  const int offset = JavaScriptFrameConstants::kReceiverOffset;
+  Memory::Object_at(caller_sp() + offset) = value;
 }