Introduce extended mode.

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index 29c2fc612a5d252cf5bcc31bee35fe6cbca43337..284fad6ab54996908fab4248c36e307007fed95f 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -1225,7 +1225,7 @@ class LStoreGlobalGeneric: public LTemplateInstruction<0, 2, 0> {
   LOperand* global_object() { return InputAt(0); }
   Handle<Object> name() const { return hydrogen()->name(); }
   LOperand* value() { return InputAt(1); }
-  bool strict_mode() { return hydrogen()->strict_mode(); }
+  StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 
@@ -1585,7 +1585,6 @@ class LStoreNamedGeneric: public LTemplateInstruction<0, 2, 0> {
   LOperand* value() { return inputs_[1]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
-  bool strict_mode() { return strict_mode_flag() == kStrictMode; }
 };
 
 
@@ -1647,7 +1646,7 @@ class LStoreKeyedGeneric: public LTemplateInstruction<0, 3, 0> {
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
-  bool strict_mode() { return hydrogen()->strict_mode(); }
+  StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 class LStoreKeyedSpecializedArrayElement: public LTemplateInstruction<0, 3, 0> {