Added type recording for unary minus and unary bitwise negation. Note that the

src/type-info.h

Index: src/type-info.h
===================================================================
--- src/type-info.h	(revision 7683)
+++ src/type-info.h	(working copy)
@@ -227,6 +227,7 @@
 
 // Forward declarations.
 class Assignment;
+class UnaryOperation;
 class BinaryOperation;
 class Call;
 class CompareOperation;
@@ -258,6 +259,7 @@
   bool LoadIsBuiltin(Property* expr, Builtins::Name id);
 
   // Get type information for arithmetic operations and compares.
+  TypeInfo UnaryType(UnaryOperation* expr);
   TypeInfo BinaryType(BinaryOperation* expr);
   TypeInfo CompareType(CompareOperation* expr);
   TypeInfo SwitchType(CaseClause* clause);