Replace boolean indications of strict mode by an enum value.

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index 1346f9ed2aa7abcaf6f73a387fb3e80821ae2956..5f23afab00639b95e0629112ffb7311b94921c62 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -1640,7 +1640,8 @@ class LStoreNamedGeneric: public LTemplateInstruction<0, 3, 0> {
   LOperand* object() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
   Handle<Object> name() const { return hydrogen()->name(); }
-  bool strict_mode() { return hydrogen()->strict_mode(); }
+  StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
+  bool strict_mode() { return strict_mode_flag() == kStrictMode; }
 };