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

ppapi/proxy/plugin_var_tracker.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/proxy/plugin_var_tracker.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/proxy/plugin_array_buffer_var.h"
@@ skipping 123 matching lines @@
       HostVar(dispatcher, static_cast<int32>(host_object.value.as_id)));
   if (found == host_var_to_plugin_var_.end()) {
     NOTREACHED();
     return;
   }
 
   // Now just release the object given the plugin var ID.
   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);
 }
 
 int32 PluginVarTracker::AddVarInternal(Var* var, AddVarRefMode mode) {
   // Normal adding.
   int32 new_id = VarTracker::AddVarInternal(var, mode);
 
   // Need to add proxy objects to the host var map.
   ProxyObjectVar* proxy_object = var->AsProxyObjectVar();
@@ skipping 101 matching lines @@
   VarMap::iterator ret = live_vars_.find(found->second);
   DCHECK(ret != live_vars_.end());
 
   // All objects should be proxy objects.
   DCHECK(ret->second.var->AsProxyObjectVar());
   return scoped_refptr<ProxyObjectVar>(ret->second.var->AsProxyObjectVar());
 }
 
 }  // namesace proxy
 }  // namespace ppapi