CpuProfiler: replace FLAG_hydrogen_track_positions with is_tracking_positions method on Compilation…

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index c454a2840beaab01d769098d6726f7046b5ac948..5d9a350a37cd151e3aef58a670244deec810197d 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1874,7 +1874,7 @@ class HGraphBuilder {
   }
 
   void EnterInlinedSource(int start_position, int id) {
-    if (FLAG_hydrogen_track_positions) {
+    if (top_info()->is_tracking_positions()) {
       start_position_ = start_position;
       position_.set_inlining_id(id);
     }