Remove unused code for AstSentinels and related stuff.

src/ast.cc

Index: src/ast.cc
===================================================================
--- src/ast.cc	(revision 9116)
+++ src/ast.cc	(working copy)
@@ -36,15 +36,6 @@
 namespace v8 {
 namespace internal {
 
-AstSentinels::AstSentinels()
-    : this_proxy_(Isolate::Current(), true),
-      identifier_proxy_(Isolate::Current(), false),
-      valid_left_hand_side_sentinel_(Isolate::Current()),
-      this_property_(Isolate::Current(), &this_proxy_, NULL, 0),
-      call_sentinel_(Isolate::Current(), NULL, NULL, 0) {
-}
-
-
 // ----------------------------------------------------------------------------
 // All the Accept member functions for each syntax tree node type.
 
@@ -101,15 +92,6 @@
 }
 
 
-VariableProxy::VariableProxy(Isolate* isolate, bool is_this)
-    : Expression(isolate),
-      var_(NULL),
-      is_this_(is_this),
-      inside_with_(false),
-      is_trivial_(false) {
-}
-
-
 void VariableProxy::BindTo(Variable* var) {
   ASSERT(var_ == NULL);  // must be bound only once
   ASSERT(var != NULL);  // must bind
@@ -487,12 +469,6 @@
 }
 
 
-bool ValidLeftHandSideSentinel::IsInlineable() const {
-  UNREACHABLE();
-  return false;
-}
-
-
 bool ForStatement::IsInlineable() const {
   return (init() == NULL || init()->IsInlineable())
       && (cond() == NULL || cond()->IsInlineable())