[interpreter] A couple of minor tweaks to BytecodeArray.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 2bd8b533ace8ac88d0801d2559a5f6ba33b420c1..1a0664f8887ff1b235f8558d3f2a0fe9fae050f7 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -3639,8 +3639,17 @@ void BytecodeArray::set(int index, byte value) {
 }
 
 
-INT_ACCESSORS(BytecodeArray, frame_size, kFrameSizeOffset)
-INT_ACCESSORS(BytecodeArray, number_of_locals, kNumberOfLocalsOffset)
+void BytecodeArray::set_frame_size(int frame_size) {
+  // We need at least one stack slot for the return register.
+  DCHECK_GE(frame_size, kPointerSize);
+  DCHECK(IsAligned(frame_size, static_cast<unsigned>(kPointerSize)));
+  WRITE_INT_FIELD(this, kFrameSizeOffset, frame_size);
+}
+
+
+int BytecodeArray::frame_size() const {
+  return READ_INT_FIELD(this, kFrameSizeOffset);
+}
 
 
 Address BytecodeArray::GetFirstBytecodeAddress() {