Implemented Browser Plugin (NOT FOR REVIEW)

ppapi/shared_impl/var_tracker.h

Index: ppapi/shared_impl/var_tracker.h
diff --git a/ppapi/shared_impl/var_tracker.h b/ppapi/shared_impl/var_tracker.h
index 9ab22f2d02a00a3aac785473cbcd82562efe3dab..c06f83c0c941daee7ea171de4335e316768913d0 100644
--- a/ppapi/shared_impl/var_tracker.h
+++ b/ppapi/shared_impl/var_tracker.h
@@ -20,6 +20,10 @@ namespace ppapi {
 class ArrayBufferVar;
 class Var;
 
+namespace proxy {
+class Dispatcher;
+}
+
 // Tracks non-POD (refcounted) var objects held by a plugin.
 //
 // The tricky part is the concept of a "tracked object". These are only
@@ -84,6 +88,38 @@ class PPAPI_SHARED_EXPORT VarTracker
   int GetRefCountForObject(const PP_Var& object);
   int GetTrackedWithNoReferenceCountForObject(const PP_Var& object);
 
+  // Manages tracking for receiving a VARTYPE_OBJECT from the remote side
+  // (either the plugin or the renderer) that has already had its reference
+  // count incremented on behalf of the caller.
+  virtual PP_Var ReceiveObjectPassRef(const PP_Var& var,
+                                      proxy::Dispatcher* dispatcher) {
+      return PP_Var();
+  }
+
+  // See the comment in var_tracker.h for more about what a tracked object is.
+  // This adds and releases the "track_with_no_reference_count" for a given
+  // object.
+  virtual PP_Var TrackObjectWithNoReference(const PP_Var& host_var,
+                                            proxy::Dispatcher* dispatcher) {
+    return PP_Var();
+  }
+
+  virtual void StopTrackingObjectWithNoReference(const PP_Var& plugin_var) { }
+
+  // Returns the host var for the corresponding plugin object var. The object
+  // should be a VARTYPE_OBJECT. The reference count is not affeceted.
+  virtual PP_Var GetHostObject(const PP_Var& plugin_object) const {
+      return PP_Var();
+  }
+
+  virtual proxy::Dispatcher* DispatcherForPluginObject(
+      const PP_Var& plugin_object) const { return NULL; }
+
+  // Like Release() but the var is identified by its host object ID (as
+  // returned by GetHostObject).
+  void ReleaseHostObject(proxy::Dispatcher* dispatcher,
+                         const PP_Var& host_object) {}
+
  protected:
   struct VarInfo {
     VarInfo();