Add a new globals object for PPAPI tracking information.

ppapi/proxy/ppb_file_chooser_proxy.cc

Index: ppapi/proxy/ppb_file_chooser_proxy.cc
diff --git a/ppapi/proxy/ppb_file_chooser_proxy.cc b/ppapi/proxy/ppb_file_chooser_proxy.cc
index 261f9f306335768a6948978f8709097afe664236..2cfb7153c237127aeb1298e03c2077d4dfffb16e 100644
--- a/ppapi/proxy/ppb_file_chooser_proxy.cc
+++ b/ppapi/proxy/ppb_file_chooser_proxy.cc
@@ -17,6 +17,8 @@
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppb_file_ref_proxy.h"
 #include "ppapi/proxy/serialized_var.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
+#include "ppapi/shared_impl/resource_tracker.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/thunk/resource_creation_api.h"
 #include "ppapi/thunk/thunk.h"
@@ -87,7 +89,7 @@ FileChooser::~FileChooser() {
 
   // Any existing files we haven't transferred ownership to the plugin need
   // to be freed.
-  PluginResourceTracker* tracker = PluginResourceTracker::GetInstance();
+  ResourceTracker* tracker = PpapiGlobals::Get()->GetResourceTracker();
   while (!file_queue_.empty()) {
     tracker->ReleaseResource(file_queue_.front());
     file_queue_.pop();