Cleanup native, collected, and stub code handling in profiler

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index e876e666fef636cc5bc86dfd7d82d0d0552e6d9f..8b1de34109fd1c5aaeb4053e1eb46caa7738d0b3 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -816,7 +816,10 @@ class RawCode : public RawObject {
     return reinterpret_cast<RawObject**>(&ptr()->instructions_);
   }
   RawInstructions* instructions_;
-  RawFunction* function_;
+  RawObject* owner_;  // Function, Null, or a smi (class id).
+  // If owner_ is Function::null() the owner is a regular stub.
+  // If owner_ is a cid the owner is the allocation stub for the cid.
+  // Else, owner_ is a regular Dart Function.

[turnidge, 2014/02/28 19:45:43]

Can we put the comment above the declaration and get rid of the same-line
comment?

[Cutch, 2014/02/28 19:48:08]

Done.

   RawExceptionHandlers* exception_handlers_;
   RawPcDescriptors* pc_descriptors_;
   RawArray* deopt_info_array_;