sim: Move SimObject resolver to sim_object.hh

The object resolver isn't serialization specific and shouldn't live in
serialize.hh. Move it to sim_object.hh since it queries to the
SimObject hierarchy.

src/sim/serialize.hh

@@ -64,6 +64,7 @@ class IniFile;
 class Serializable;
 class CheckpointIn;
 class SimObject;
+class SimObjectResolver;
 class EventQueue;
 
 typedef std::ostream CheckpointOut;
@@ -449,17 +450,6 @@ class SerializableClass
 SerializableClass the##OBJ_CLASS##Class(CLASS_NAME,                        \
                                          OBJ_CLASS::createForUnserialize);
 
-// Base class to wrap object resolving functionality.  This can be
-// provided to Checkpoint to allow it to map object names onto
-// object C++ objects in which to unserialize
-class SimObjectResolver
-{
-  public:
-    virtual ~SimObjectResolver() { }
-
-    // Find a SimObject given a full path name
-    virtual SimObject *resolveSimObject(const std::string &name) = 0;
-};
 
 class CheckpointIn
 {

src/sim/sim_object.hh

@@ -231,6 +231,21 @@ class SimObject : public EventManager, public Serializable, public Drainable
     static SimObject *find(const char *name);
 };
 
+/**
+ * Base class to wrap object resolving functionality.
+ *
+ * This can be provided to the serialization framework to allow it to
+ * map object names onto C++ objects.
+ */
+class SimObjectResolver
+{
+  public:
+    virtual ~SimObjectResolver() { }
+
+    // Find a SimObject given a full path name
+    virtual SimObject *resolveSimObject(const std::string &name) = 0;
+};
+
 #ifdef DEBUG
 void debugObjectBreak(const char *objs);
 #endif