MIPS: Introduce LanguageMode, drop StrictMode.

src/ic/mips/ic-mips.cc

Index: src/ic/mips/ic-mips.cc
diff --git a/src/ic/mips/ic-mips.cc b/src/ic/mips/ic-mips.cc
index 42c7ad12413bfa29474834ff91c6c5db404c1ca0..33b78cec58a07479adcda5ae154647a1b12cbf6d 100644
--- a/src/ic/mips/ic-mips.cc
+++ b/src/ic/mips/ic-mips.cc
@@ -724,7 +724,7 @@ static void KeyedStoreGenerateMegamorphicHelper(
 
 
 void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
-                                       StrictMode strict_mode) {
+                                       LanguageMode language_mode) {
   // ---------- S t a t e --------------
   //  -- a0     : value
   //  -- a1     : key
@@ -775,7 +775,7 @@ void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
   // a0: value.
   // a1: key.
   // a2: receiver.
-  PropertyICCompiler::GenerateRuntimeSetProperty(masm, strict_mode);
+  PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode);
   // Never returns to here.
 
   __ bind(&maybe_name_key);