Introduce LiteralsArray to hide it's implementation.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index b163061458ec1376cfd4623c957df2138a0df90c..e10ffc5689e0945dc4e660cad1415c22acd6a27f 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -5398,7 +5398,7 @@ void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) {
   // r0 = regexp literal clone.
   // r2-5 are used as temporaries.
   int literal_offset =
-      FixedArray::OffsetOfElementAt(instr->hydrogen()->literal_index());
+      LiteralsArray::OffsetOfLiteralAt(instr->hydrogen()->literal_index());
   __ Move(r6, instr->hydrogen()->literals());
   __ ldr(r1, FieldMemOperand(r6, literal_offset));
   __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);