Introduce LanguageMode, drop StrictMode.

src/ic/arm64/ic-arm64.cc

 // Copyright 2013 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
@@ skipping 729 matching lines @@
                                          receiver_map, x10, x11, slow);
   mode = AllocationSite::GetMode(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS);
   ElementsTransitionGenerator::GenerateDoubleToObject(
       masm, receiver, key, value, receiver_map, mode, slow);
   __ Ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
   __ B(&finish_store);
 }
 
 
 void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
-                                       StrictMode strict_mode) {
+                                       LanguageMode language_mode) {
   ASM_LOCATION("KeyedStoreIC::GenerateMegamorphic");
   Label slow;
   Label array;
   Label fast_object;
   Label extra;
   Label fast_object_grow;
   Label fast_double_grow;
   Label fast_double;
   Label maybe_name_key;
   Label miss;
@@ skipping 34 matching lines @@
   __ Cmp(x10, Operand::UntagSmi(key));
   __ B(hi, &fast_object);
 
 
   __ Bind(&slow);
   // Slow case, handle jump to runtime.
   // Live values:
   //  x0: value
   //  x1: key
   //  x2: receiver
-  PropertyICCompiler::GenerateRuntimeSetProperty(masm, strict_mode);
+  PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode);
   // Never returns to here.
 
   __ bind(&maybe_name_key);
   __ Ldr(x10, FieldMemOperand(key, HeapObject::kMapOffset));
   __ Ldrb(x10, FieldMemOperand(x10, Map::kInstanceTypeOffset));
   __ JumpIfNotUniqueNameInstanceType(x10, &slow);
   Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
       Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, Code::STORE_IC, flags, false, receiver, key, x3, x4, x5, x6);
@@ skipping 178 matching lines @@
   } else {
     DCHECK(to_patch->Mask(TestBranchMask) == TBNZ);
     // This is JumpIfSmi(smi_reg, branch_imm).
     patcher.tbz(smi_reg, 0, branch_imm);
   }
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64