Introduce LiteralsArray to hide it's implementation.

src/arm64/lithium-codegen-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/arm64/frames-arm64.h"
 #include "src/arm64/lithium-codegen-arm64.h"
 #include "src/arm64/lithium-gap-resolver-arm64.h"
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 5630 matching lines @@
 
 void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) {
   DCHECK(ToRegister(instr->context()).is(cp));
   Label materialized;
   // Registers will be used as follows:
   // x7 = literals array.
   // x1 = regexp literal.
   // x0 = regexp literal clone.
   // x10-x12 are used as temporaries.
   int literal_offset =
-      FixedArray::OffsetOfElementAt(instr->hydrogen()->literal_index());
+      LiteralsArray::OffsetOfLiteralAt(instr->hydrogen()->literal_index());
   __ LoadObject(x7, instr->hydrogen()->literals());
   __ Ldr(x1, FieldMemOperand(x7, literal_offset));
   __ JumpIfNotRoot(x1, Heap::kUndefinedValueRootIndex, &materialized);
 
   // Create regexp literal using runtime function
   // Result will be in x0.
   __ Mov(x12, Operand(Smi::FromInt(instr->hydrogen()->literal_index())));
   __ Mov(x11, Operand(instr->hydrogen()->pattern()));
   __ Mov(x10, Operand(instr->hydrogen()->flags()));
   __ Push(x7, x12, x11, x10);
@@ skipping 350 matching lines @@
   Handle<ScopeInfo> scope_info = instr->scope_info();
   __ Push(scope_info);
   __ Push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 }  // namespace internal
 }  // namespace v8