Unify var tracking between webkit and the proxy.

ppapi/shared_impl/tracker_base.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_SHARED_IMPL_TRACKER_BASE_H_
 #define PPAPI_SHARED_IMPL_TRACKER_BASE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/proxy/interface_id.h"
 
 namespace ppapi {
 
 class FunctionGroupBase;
 class ResourceObjectBase;
-class Var;
+class VarTracker;
 
 // Tracks resource and function APIs, providing a mapping between ID and
 // object.
 // TODO(brettw) Eventually this should be one object with global tracking and
 // called "Tracker", and this would be used in both the plugin side of the
 // proxy as well as the implementation in the renderer. Currently, all this
 // does is forward to the process-type-specific tracker to get the information.
 // TODO(fischman/vrk): When brettw fixes the TODO above, fix the ugliness in
 // VideoDecoderImpl accordingly.
 class TrackerBase {
@@ skipping 14 matching lines @@
 
   // Returns the function object corresponding to the given ID, or NULL if
   // there isn't one.
   virtual FunctionGroupBase* GetFunctionAPI(PP_Instance inst,
                                             pp::proxy::InterfaceID id) = 0;
 
   // Returns the instance corresponding to the given resource, or 0 if the
   // resource is invalid.
   virtual PP_Instance GetInstanceForResource(PP_Resource resource) = 0;
 
-  // PP_Vars -------------------------------------------------------------------
-
-  // Adds a new var to the tracker, returning the new Var ID.
-  virtual int32 AddVar(Var* var) = 0;
-
-  // Retrieves a var from the tracker, returning an empty scoped ptr on failure.
-  virtual scoped_refptr<Var> GetVar(int32 var_id) const = 0;
-
-  virtual bool AddRefVar(int32 var_id) = 0;
-  virtual bool UnrefVar(int32 var_id) = 0;
+  virtual VarTracker* GetVarTracker() = 0;
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_TRACKER_BASE_H_