Make it possible to have 1 PpapiGlobals per thread. Update unit tests.

ppapi/proxy/plugin_var_tracker.cc

Index: ppapi/proxy/plugin_var_tracker.cc
diff --git a/ppapi/proxy/plugin_var_tracker.cc b/ppapi/proxy/plugin_var_tracker.cc
index a7c83f34eb54198c711b026ff5ed68346d2634b1..fd25c98158baf4d88500f17ea093f6f47963d8e2 100644
--- a/ppapi/proxy/plugin_var_tracker.cc
+++ b/ppapi/proxy/plugin_var_tracker.cc
@@ -141,21 +141,6 @@ void PluginVarTracker::ReleaseHostObject(PluginDispatcher* dispatcher,
   ReleaseVar(found->second);
 }
 
-int PluginVarTracker::GetRefCountForObject(const PP_Var& plugin_object) {
-  VarMap::iterator found = GetLiveVar(plugin_object);
-  if (found == live_vars_.end())
-    return -1;
-  return found->second.ref_count;
-}
-
-int PluginVarTracker::GetTrackedWithNoReferenceCountForObject(
-    const PP_Var& plugin_object) {
-  VarMap::iterator found = GetLiveVar(plugin_object);
-  if (found == live_vars_.end())
-    return -1;
-  return found->second.track_with_no_reference_count;
-}
-
 ArrayBufferVar* PluginVarTracker::CreateArrayBuffer(uint32 size_in_bytes) {
   return new PluginArrayBufferVar(size_in_bytes);
 }