[profiler] fix memory leak for code entries for runtime callstats.

src/profiler/profile-generator.h

Index: src/profiler/profile-generator.h
diff --git a/src/profiler/profile-generator.h b/src/profiler/profile-generator.h
index 1b3cad6dc3ee7a2aa804103884d369ee769c9143..38a0cf26e4f3eb531db2a943270afa5bfe97ada7 100644
--- a/src/profiler/profile-generator.h
+++ b/src/profiler/profile-generator.h
@@ -369,6 +369,7 @@ class CpuProfilesCollection {
 class ProfileGenerator {
  public:
   ProfileGenerator(Isolate* isolate, CpuProfilesCollection* profiles);
+  ~ProfileGenerator();
 
   void RecordTickSample(const TickSample& sample);
 
@@ -381,6 +382,7 @@ class ProfileGenerator {
   Isolate* isolate_;
   CpuProfilesCollection* profiles_;
   CodeMap code_map_;
+  std::vector<CodeEntry*> code_entries_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileGenerator);
 };