Add a few tests to ProfilerEventsProcessor.

src/profile-generator.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 46 matching lines @@
 
 class ProfileNode {
  public:
   INLINE(explicit ProfileNode(CodeEntry* entry));
 
   ProfileNode* FindChild(CodeEntry* entry);
   ProfileNode* FindOrAddChild(CodeEntry* entry);
   INLINE(void IncrementSelfTicks()) { ++self_ticks_; }
   INLINE(void IncreaseTotalTicks(unsigned amount)) { total_ticks_ += amount; }
 
-  INLINE(CodeEntry* entry()) { return entry_; }
-  INLINE(unsigned total_ticks()) { return total_ticks_; }
-  INLINE(unsigned self_ticks()) { return self_ticks_; }
+  INLINE(CodeEntry* entry() const) { return entry_; }
+  INLINE(unsigned total_ticks() const) { return total_ticks_; }
+  INLINE(unsigned self_ticks() const) { return self_ticks_; }
+  void GetChildren(List<ProfileNode*>* children);
 
   void Print(int indent);
 
  private:
   INLINE(static bool CodeEntriesMatch(void* entry1, void* entry2)) {
     return entry1 == entry2;
   }
 
   INLINE(static uint32_t CodeEntryHash(CodeEntry* entry)) {
     return static_cast<int32_t>(reinterpret_cast<intptr_t>(entry));
@@ skipping 157 matching lines @@
   CpuProfilesCollection* profiles_;
   CodeMap code_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_