Remove variable rewrites and the unneccesary Slot class.

src/variables.cc

Index: src/variables.cc
diff --git a/src/variables.cc b/src/variables.cc
index 69495bb40fdaea610e688319dac480ce091e0747..6cf6e0b04a9a62e4bc865414336558bec7eee590 100644
--- a/src/variables.cc
+++ b/src/variables.cc
@@ -53,34 +53,6 @@ const char* Variable::Mode2String(Mode mode) {
 }
 
 
-Property* Variable::AsProperty() const {
-  return rewrite_ == NULL ? NULL : rewrite_->AsProperty();
-}
-
-
-Slot* Variable::AsSlot() const { return rewrite_; }
-
-
-bool Variable::IsStackAllocated() const {
-  return rewrite_ != NULL && rewrite_->IsStackAllocated();
-}
-
-
-bool Variable::IsParameter() const {
-  return rewrite_ != NULL && rewrite_->type() == Slot::PARAMETER;
-}
-
-
-bool Variable::IsStackLocal() const {
-  return rewrite_ != NULL && rewrite_->type() == Slot::LOCAL;
-}
-
-
-bool Variable::IsContextSlot() const {
-  return rewrite_ != NULL && rewrite_->type() == Slot::CONTEXT;
-}
-
-
 Variable::Variable(Scope* scope,
                    Handle<String> name,
                    Mode mode,
@@ -90,8 +62,9 @@ Variable::Variable(Scope* scope,
     name_(name),
     mode_(mode),
     kind_(kind),
+    location_(UNALLOCATED),
+    index_(-1),
     local_if_not_shadowed_(NULL),
-    rewrite_(NULL),
     is_valid_LHS_(is_valid_LHS),
     is_accessed_from_inner_function_scope_(false),
     is_used_(false) {