Fix ProfileCode ticking and add unit test

runtime/vm/profiler_service.h

Index: runtime/vm/profiler_service.h
diff --git a/runtime/vm/profiler_service.h b/runtime/vm/profiler_service.h
index 7990b4dc55e53caf69086dcc4ca32b1921133624..7d746455f1e84620ece86cb01e3b65f8da5bc8dd 100644
--- a/runtime/vm/profiler_service.h
+++ b/runtime/vm/profiler_service.h
@@ -349,6 +349,12 @@ class ProfileTrieWalker : public ValueObject {
   void Reset(Profile::TrieKind trie_kind);
 
   const char* CurrentName();
+  // Return the current node's peer's inclusive tick count.
+  intptr_t CurrentInclusiveTicks();
+  // Return the current node's peer's exclusive tick count.
+  intptr_t CurrentExclusiveTicks();
+  // Return the current node's tick count.
+  intptr_t CurrentNodeTickCount();
 
   bool Down();
   bool NextSibling();