[vm] Properly exclude the field descriptors from product builds.

TEST=ci
Change-Id: Ia9d345f7f6488b24b780979fd624d708c7038811
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/231182
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>

runtime/vm/raw_object_fields.cc

diff --git a/runtime/vm/raw_object_fields.cc b/runtime/vm/raw_object_fields.cc
index e59f439..9fcc4d2f 100644
--- a/runtime/vm/raw_object_fields.cc
+++ b/runtime/vm/raw_object_fields.cc
@@ -6,7 +6,7 @@
 
 namespace dart {
 
-#if defined(DART_PRECOMPILER) || !defined(DART_PRODUCT)
+#if defined(DART_PRECOMPILER) || !defined(PRODUCT)
 
 #define COMMON_CLASSES_AND_FIELDS(F)                                           \
   F(Class, name_)                                                              \

runtime/vm/raw_object_fields.h

diff --git a/runtime/vm/raw_object_fields.h b/runtime/vm/raw_object_fields.h
index be56a51..611f9dd 100644
--- a/runtime/vm/raw_object_fields.h
+++ b/runtime/vm/raw_object_fields.h
@@ -19,7 +19,7 @@
 
 namespace dart {
 
-#if defined(DART_PRECOMPILER) || !defined(DART_PRODUCT)
+#if defined(DART_PRECOMPILER) || !defined(PRODUCT)
 
 class OffsetsTable : public ZoneAllocated {
  public: