Unify var tracking between webkit and the proxy.

ppapi/proxy/ppb_var_deprecated_proxy.cc

Index: ppapi/proxy/ppb_var_deprecated_proxy.cc
===================================================================
--- ppapi/proxy/ppb_var_deprecated_proxy.cc	(revision 95769)
+++ ppapi/proxy/ppb_var_deprecated_proxy.cc	(working copy)
@@ -14,11 +14,15 @@
 #include "ppapi/c/ppb_core.h"
 #include "ppapi/proxy/host_dispatcher.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
+#include "ppapi/proxy/plugin_resource_tracker.h"
 #include "ppapi/proxy/plugin_var_tracker.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppp_class_proxy.h"
 #include "ppapi/proxy/serialized_var.h"
+#include "ppapi/shared_impl/var.h"
 
+using ppapi::StringVar;
+
 namespace pp {
 namespace proxy {
 
@@ -35,17 +39,20 @@
   if (exception && exception->type != PP_VARTYPE_UNDEFINED)
     return NULL;
 
-  PluginVarTracker* tracker = PluginVarTracker::GetInstance();
-  PluginDispatcher* dispatcher = tracker->DispatcherForPluginObject(object);
-  if (dispatcher)
-    return dispatcher;
 
+  if (object.type == PP_VARTYPE_OBJECT) {
+    // Get the dispatcher for the object.
+    PluginDispatcher* dispatcher = PluginResourceTracker::GetInstance()->
+        var_tracker().DispatcherForPluginObject(object);
+    if (dispatcher)
+      return dispatcher;
+  }
+
   // The object is invalid. This means we can't figure out which dispatcher
   // to use, which is OK because the call will fail anyway. Set the exception.
   if (exception) {
-    exception->type = PP_VARTYPE_STRING;
-    exception->value.as_id =
-        tracker->MakeString("Attempting to use an invalid object");
+    *exception = StringVar::StringToPPVar(0,
+        std::string("Attempting to use an invalid object"));
   }
   return NULL;
 }
@@ -53,27 +60,22 @@
 // PPP_Var_Deprecated plugin ---------------------------------------------------
 
 void AddRefVar(PP_Var var) {
-  PluginVarTracker::GetInstance()->AddRef(var);
+  PluginResourceTracker::GetInstance()->var_tracker().AddRefVar(var);
 }
 
 void ReleaseVar(PP_Var var) {
-  PluginVarTracker::GetInstance()->Release(var);
+  PluginResourceTracker::GetInstance()->var_tracker().ReleaseVar(var);
 }
 
 PP_Var VarFromUtf8(PP_Module module, const char* data, uint32_t len) {
-  PP_Var ret = {};
-  ret.type = PP_VARTYPE_STRING;
-  ret.value.as_id = PluginVarTracker::GetInstance()->MakeString(
-      data, len);
-  return ret;
+  return StringVar::StringToPPVar(module, data, len);
 }
 
 const char* VarToUtf8(PP_Var var, uint32_t* len) {
-  const std::string* str =
-      PluginVarTracker::GetInstance()->GetExistingString(var);
+  scoped_refptr<StringVar> str(StringVar::FromPPVar(var));
   if (str) {
-    *len = static_cast<uint32_t>(str->size());
-    return str->c_str();
+    *len = static_cast<uint32_t>(str->value().size());
+    return str->value().c_str();
   }
   *len = 0;
   return NULL;