Revert r9870 due to browser-test failures.

src/variables.h

Index: src/variables.h
diff --git a/src/variables.h b/src/variables.h
index f20bd399c542aefc74400fd957ff9c6a7a8fa229..be86bd19751243fbdbef640f95b536f0e0552726 100644
--- a/src/variables.h
+++ b/src/variables.h
@@ -103,9 +103,6 @@ class Variable: public ZoneObject {
   bool is_used() { return is_used_; }
   void set_is_used(bool flag) { is_used_ = flag; }
 
-  int initializer_position() { return initializer_position_; }
-  void set_initializer_position(int pos) { initializer_position_ = pos; }
-
   bool IsVariable(Handle<String> n) const {
     return !is_this() && name().is_identical_to(n);
   }
@@ -168,7 +165,6 @@ class Variable: public ZoneObject {
   Kind kind_;
   Location location_;
   int index_;
-  int initializer_position_;
 
   // If this field is set, this variable references the stored locally bound
   // variable, but it might be shadowed by variable bindings introduced by