object-stats.cc: Annotate PrintJSONArray with V8_NOINLINE

Sometimes, the compiler will inline this function and unroll the loop.
Forcing this to never be inlined reduces the compiled size of the
function from a potential 170KB to around 39KB.

BUG=v8:5240

Review-Url: https://codereview.chromium.org/2194843002
Cr-Commit-Position: refs/heads/master@{#38172}

src/heap/object-stats.cc

@@ -29,7 +29,10 @@ void ObjectStats::ClearObjectStats(bool clear_last_time_stats) {
   visited_fixed_array_sub_types_.clear();
 }
 
-static void PrintJSONArray(size_t* array, const int len) {
+// Tell the compiler to never inline this: occasionally, the optimizer will
+// decide to inline this and unroll the loop, making the compiled code more than
+// 100KB larger.
+V8_NOINLINE static void PrintJSONArray(size_t* array, const int len) {
   PrintF("[ ");
   for (int i = 0; i < len; i++) {
     PrintF("%zu", array[i]);