Revert r9901 to make tree green again.

src/ast.h

Index: src/ast.h
===================================================================
--- src/ast.h	(revision 9901)
+++ src/ast.h	(working copy)
@@ -684,8 +684,6 @@
   // Type feedback information.
   void RecordTypeFeedback(TypeFeedbackOracle* oracle);
   bool IsSmiCompare() { return compare_type_ == SMI_ONLY; }
-  bool IsSymbolCompare() { return compare_type_ == SYMBOL_ONLY; }
-  bool IsStringCompare() { return compare_type_ == STRING_ONLY; }
   bool IsObjectCompare() { return compare_type_ == OBJECT_ONLY; }
 
  private:
@@ -693,13 +691,7 @@
   Label body_target_;
   ZoneList<Statement*>* statements_;
   int position_;
-  enum CompareTypeFeedback {
-    NONE,
-    SMI_ONLY,
-    SYMBOL_ONLY,
-    STRING_ONLY,
-    OBJECT_ONLY
-  };
+  enum CompareTypeFeedback { NONE, SMI_ONLY, OBJECT_ONLY };
   CompareTypeFeedback compare_type_;
   int compare_id_;
   int entry_id_;