X87: Introduce LanguageMode, drop StrictMode.

src/x87/lithium-x87.h

Index: src/x87/lithium-x87.h
diff --git a/src/x87/lithium-x87.h b/src/x87/lithium-x87.h
index c8c83835a96e4306f2ee1132563918b3f9708523..ccd197fc4b3a1d7a9fbcbe44973359187d886b86 100644
--- a/src/x87/lithium-x87.h
+++ b/src/x87/lithium-x87.h
@@ -2238,7 +2238,7 @@ class LStoreNamedGeneric FINAL : public LTemplateInstruction<0, 3, 0> {
 
   void PrintDataTo(StringStream* stream) OVERRIDE;
   Handle<Object> name() const { return hydrogen()->name(); }
-  StrictMode strict_mode() { return hydrogen()->strict_mode(); }
+  LanguageMode language_mode() { return hydrogen()->language_mode(); }
 };
 
 
@@ -2295,7 +2295,7 @@ class LStoreKeyedGeneric FINAL : public LTemplateInstruction<0, 4, 0> {
 
   void PrintDataTo(StringStream* stream) OVERRIDE;
 
-  StrictMode strict_mode() { return hydrogen()->strict_mode(); }
+  LanguageMode language_mode() { return hydrogen()->language_mode(); }
 };