[runtime] Avoid @@isConcatSpreadable lookup for fast path Array.prototype.concat

src/crankshaft/mips64/lithium-codegen-mips64.cc

Index: src/crankshaft/mips64/lithium-codegen-mips64.cc
diff --git a/src/crankshaft/mips64/lithium-codegen-mips64.cc b/src/crankshaft/mips64/lithium-codegen-mips64.cc
index d14efafd4d6f55c3ff5cd7d33f50ff40bfbb82b8..54025dc61178316a310b08ebf3b3274b53dffa13 100644
--- a/src/crankshaft/mips64/lithium-codegen-mips64.cc
+++ b/src/crankshaft/mips64/lithium-codegen-mips64.cc
@@ -3074,8 +3074,8 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
     __ Branch(&done, ne, result, Operand(scratch));
     if (info()->IsStub()) {
       // A stub can safely convert the hole to undefined only if the array
-      // protector cell contains (Smi) Isolate::kArrayProtectorValid. Otherwise
-      // it needs to bail out.
+      // protector cell contains (Smi) Isolate::kArrayProtectorValid.
+      // Otherwise it needs to bail out.
       __ LoadRoot(result, Heap::kArrayProtectorRootIndex);
       // The comparison only needs LS bits of value, which is a smi.
       __ ld(result, FieldMemOperand(result, Cell::kValueOffset));