Adds support for collecting statistics about code and its metadata.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 5895ebbc9d7c33b1ba1208a08e220e178c7aca7d..4cc39d100aa624d474a9978aa83ea9b3b39e355b 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -352,10 +352,10 @@ class ThreadLocalTop BASE_EMBEDDED {
 
 #ifdef DEBUG
 
-#define ISOLATE_INIT_DEBUG_ARRAY_LIST(V)                                       \
-  V(CommentStatistic, paged_space_comments_statistics,                         \
-      CommentStatistic::kMaxComments + 1)                                      \
-  V(int, code_kind_statistics, Code::NUMBER_OF_KINDS)
+#define ISOLATE_INIT_DEBUG_ARRAY_LIST(V)               \
+  V(CommentStatistic, paged_space_comments_statistics, \
+    CommentStatistic::kMaxComments + 1)                \
+  V(int, code_kind_statistics, AbstractCode::NUMBER_OF_KINDS)
 #else
 
 #define ISOLATE_INIT_DEBUG_ARRAY_LIST(V)
@@ -398,6 +398,8 @@ typedef List<HeapObject*> DebugObjectCache;
   V(uint32_t, per_isolate_assert_data, 0xFFFFFFFFu)                            \
   V(PromiseRejectCallback, promise_reject_callback, NULL)                      \
   V(const v8::StartupData*, snapshot_blob, NULL)                               \
+  V(int, code_and_metadata_size, 0)                                            \
+  V(int, bytecode_and_metadata_size, 0)                                        \
   ISOLATE_INIT_SIMULATOR_LIST(V)
 
 #define THREAD_LOCAL_TOP_ACCESSOR(type, name)                        \