Introduce LanguageMode, drop StrictMode.

src/x64/lithium-x64.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_X64_LITHIUM_X64_H_
 #define V8_X64_LITHIUM_X64_H_
 
 #include "src/hydrogen.h"
 #include "src/lithium.h"
 #include "src/lithium-allocator.h"
@@ skipping 2194 matching lines @@
   LOperand* context() { return inputs_[0]; }
   LOperand* object() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric, "store-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedGeneric)
 
   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(); }
 };
 
 
 class LStoreKeyed FINAL : public LTemplateInstruction<0, 3, 0> {
  public:
   LStoreKeyed(LOperand* object, LOperand* key, LOperand* value) {
     inputs_[0] = object;
     inputs_[1] = key;
     inputs_[2] = value;
   }
@@ skipping 34 matching lines @@
   LOperand* context() { return inputs_[0]; }
   LOperand* object() { return inputs_[1]; }
   LOperand* key() { return inputs_[2]; }
   LOperand* value() { return inputs_[3]; }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreKeyedGeneric)
 
   void PrintDataTo(StringStream* stream) OVERRIDE;
 
-  StrictMode strict_mode() { return hydrogen()->strict_mode(); }
+  LanguageMode language_mode() { return hydrogen()->language_mode(); }
 };
 
 
 class LTransitionElementsKind FINAL : public LTemplateInstruction<0, 2, 2> {
  public:
   LTransitionElementsKind(LOperand* object,
                           LOperand* context,
                           LOperand* new_map_temp,
                           LOperand* temp) {
     inputs_[0] = object;
@@ skipping 586 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::int
 
 #endif  // V8_X64_LITHIUM_X64_H_