Replace our homegrown ARRAY_SIZE() with Chrome's arraysize().

src/arm64/assembler-arm64.cc

Index: src/arm64/assembler-arm64.cc
diff --git a/src/arm64/assembler-arm64.cc b/src/arm64/assembler-arm64.cc
index 7f86e14a777c77109bb8d1441581f5c094b73d57..9d804db17b9976e95f2ecbbb63022b0ef5e6a4ee 100644
--- a/src/arm64/assembler-arm64.cc
+++ b/src/arm64/assembler-arm64.cc
@@ -227,7 +227,7 @@ bool AreAliased(const CPURegister& reg1, const CPURegister& reg2,
 
   const CPURegister regs[] = {reg1, reg2, reg3, reg4, reg5, reg6, reg7, reg8};
 
-  for (unsigned i = 0; i < ARRAY_SIZE(regs); i++) {
+  for (unsigned i = 0; i < arraysize(regs); i++) {
     if (regs[i].IsRegister()) {
       number_of_valid_regs++;
       unique_regs |= regs[i].Bit();
@@ -2664,7 +2664,7 @@ bool Assembler::IsImmLogical(uint64_t value,
   int multiplier_idx = CountLeadingZeros(d, kXRegSizeInBits) - 57;
   // Ensure that the index to the multipliers array is within bounds.
   DCHECK((multiplier_idx >= 0) &&
-         (static_cast<size_t>(multiplier_idx) < ARRAY_SIZE(multipliers)));
+         (static_cast<size_t>(multiplier_idx) < arraysize(multipliers)));
   uint64_t multiplier = multipliers[multiplier_idx];
   uint64_t candidate = (b - a) * multiplier;