Allow closures to be optimized if outer contexts that call eval are all in strict mode.

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 3b997abee3f5bed8829ccb5661acecd90420754d..4b077263a4043f80f8dadd795ef18058dd5796c4 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -351,6 +351,11 @@ class Context: public FixedArray {
   // eval.
   bool GlobalIfNotShadowedByEval(Handle<String> name);
 
+  // Determine if any function scope in the context call eval and if
+  // any of those calls are in non-strict mode.
+  void ComputeEvalScopeInfo(bool* outer_scope_calls_eval,
+                            bool* outer_scope_calls_non_strict_eval);
+
   // Code generation support.
   static int SlotOffset(int index) {
     return kHeaderSize + index * kPointerSize - kHeapObjectTag;