Add initial semi-working producers profile.

src/heap-profiler.h

Index: src/heap-profiler.h
diff --git a/src/heap-profiler.h b/src/heap-profiler.h
index 7fda883f87c1c60eca68649b4cac9793b3e06e0d..bd875df236809a1cb6e7ade710960eaa97d9de48 100644
--- a/src/heap-profiler.h
+++ b/src/heap-profiler.h
@@ -256,6 +256,14 @@ class RetainerHeapProfile BASE_EMBEDDED {
 };
 
 
+class ProducerHeapProfile : public AllStatic {
+ public:
+  static void Setup();
+  static void RecordJSObjectAllocation(Object* obj);
+ private:
+  static bool can_log_;
+};
+
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal