Move old-space allocation tracking into Heap::AllocateRaw.

src/spaces.h

Index: src/spaces.h
diff --git a/src/spaces.h b/src/spaces.h
index db0415b7b7a8b30b4d0945b4bb00eea7bb861d20..06f444d1587346db0c0421a366e718ef61b63b31 100644
--- a/src/spaces.h
+++ b/src/spaces.h
@@ -1764,16 +1764,9 @@ class PagedSpace : public Space {
     return allocation_info_.limit_address();
   }
 
-  enum AllocationType {
-    NEW_OBJECT,
-    MOVE_OBJECT
-  };
-
   // Allocate the requested number of bytes in the space if possible, return a
   // failure object if not.
-  MUST_USE_RESULT inline MaybeObject* AllocateRaw(
-      int size_in_bytes,
-      AllocationType event = NEW_OBJECT);
+  MUST_USE_RESULT inline MaybeObject* AllocateRaw(int size_in_bytes);
 
   virtual bool ReserveSpace(int bytes);