Add a new globals object for PPAPI tracking information.

ppapi/proxy/ppb_file_ref_proxy.cc

Index: ppapi/proxy/ppb_file_ref_proxy.cc
diff --git a/ppapi/proxy/ppb_file_ref_proxy.cc b/ppapi/proxy/ppb_file_ref_proxy.cc
index 49a113195d309180654293ea37f3cfda3a685961..c9824a42dd688f7cdda240596ad24f698a1b1c1b 100644
--- a/ppapi/proxy/ppb_file_ref_proxy.cc
+++ b/ppapi/proxy/ppb_file_ref_proxy.cc
@@ -90,7 +90,7 @@ int32_t FileRef::Delete(PP_CompletionCallback callback) {
 int32_t FileRef::Rename(PP_Resource new_file_ref,
                         PP_CompletionCallback callback) {
   Resource* new_file_ref_object =
-      PluginResourceTracker::GetInstance()->GetResource(new_file_ref);
+      PpapiGlobals::Get()->GetResourceTracker()->GetResource(new_file_ref);
   if (!new_file_ref_object ||
       new_file_ref_object->host_resource().instance() != pp_instance())
     return PP_ERROR_BADRESOURCE;
@@ -113,7 +113,7 @@ PPB_FileRef_Proxy::~PPB_FileRef_Proxy() {
 PP_Resource PPB_FileRef_Proxy::CreateProxyResource(PP_Resource file_system,
                                                    const char* path) {
   Resource* file_system_object =
-      PluginResourceTracker::GetInstance()->GetResource(file_system);
+      PpapiGlobals::Get()->GetResourceTracker()->GetResource(file_system);
   if (!file_system_object)
     return 0;