Add a new globals object for PPAPI tracking information.

ppapi/proxy/plugin_var_serialization_rules.cc

Index: ppapi/proxy/plugin_var_serialization_rules.cc
diff --git a/ppapi/proxy/plugin_var_serialization_rules.cc b/ppapi/proxy/plugin_var_serialization_rules.cc
index 49e1fc31289a09bba51b07217ca301275b34b03a..3d9975a21efc26a273fd9b53ee0109c446703c07 100644
--- a/ppapi/proxy/plugin_var_serialization_rules.cc
+++ b/ppapi/proxy/plugin_var_serialization_rules.cc
@@ -6,15 +6,17 @@
 
 #include "base/logging.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
+#include "ppapi/proxy/plugin_globals.h"
 #include "ppapi/proxy/plugin_resource_tracker.h"
 #include "ppapi/proxy/plugin_var_tracker.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/var.h"
 
 namespace ppapi {
 namespace proxy {
 
 PluginVarSerializationRules::PluginVarSerializationRules()
-    : var_tracker_(&PluginResourceTracker::GetInstance()->var_tracker()) {
+    : var_tracker_(PluginGlobals::Get()->plugin_var_tracker()) {
 }
 
 PluginVarSerializationRules::~PluginVarSerializationRules() {