Fix invalid use of int in Zone.

src/compiler/register-allocator-verifier.cc

Index: src/compiler/register-allocator-verifier.cc
diff --git a/src/compiler/register-allocator-verifier.cc b/src/compiler/register-allocator-verifier.cc
index 45bf5ecc5f3476b047750d865bb1d27292a794b9..434e965bf3217d6b265957afa076015a06f93130 100644
--- a/src/compiler/register-allocator-verifier.cc
+++ b/src/compiler/register-allocator-verifier.cc
@@ -61,8 +61,7 @@ RegisterAllocatorVerifier::RegisterAllocatorVerifier(
   // kSameAsFirst along the way.
   for (const auto* instr : sequence->instructions()) {
     const size_t operand_count = OperandCount(instr);
-    auto* op_constraints =
-        zone->NewArray<OperandConstraint>(static_cast<int>(operand_count));
+    auto* op_constraints = zone->NewArray<OperandConstraint>(operand_count);
     size_t count = 0;
     for (size_t i = 0; i < instr->InputCount(); ++i, ++count) {
       BuildConstraint(instr->InputAt(i), &op_constraints[count]);