Add a new globals object for PPAPI tracking information.

ppapi/proxy/ppb_core_proxy.cc

Index: ppapi/proxy/ppb_core_proxy.cc
diff --git a/ppapi/proxy/ppb_core_proxy.cc b/ppapi/proxy/ppb_core_proxy.cc
index 9173df65dd69b429926eb4169b26ece53def1c55..c01eb4532542bbf60a57a52ddea47668341662bc 100644
--- a/ppapi/proxy/ppb_core_proxy.cc
+++ b/ppapi/proxy/ppb_core_proxy.cc
@@ -18,6 +18,7 @@
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_resource_tracker.h"
 #include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/proxy_lock.h"
 #include "ppapi/shared_impl/time_conversion.h"
 
@@ -34,12 +35,12 @@ base::MessageLoopProxy* GetMainThreadMessageLoop() {
 
 void AddRefResource(PP_Resource resource) {
   ppapi::ProxyAutoLock lock;
-  PluginResourceTracker::GetInstance()->AddRefResource(resource);
+  PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(resource);
 }
 
 void ReleaseResource(PP_Resource resource) {
   ppapi::ProxyAutoLock lock;
-  PluginResourceTracker::GetInstance()->ReleaseResource(resource);
+  PpapiGlobals::Get()->GetResourceTracker()->ReleaseResource(resource);
 }
 
 double GetTime() {