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

ppapi/proxy/plugin_var_tracker.h

 // 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.
 
 #ifndef PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_
 #define PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 38 matching lines @@
   PP_Var GetHostObject(const PP_Var& plugin_object) const;
 
   PluginDispatcher* DispatcherForPluginObject(
       const PP_Var& plugin_object) const;
 
   // Like Release() but the var is identified by its host object ID (as
   // returned by GetHostObject).
   void ReleaseHostObject(PluginDispatcher* dispatcher,
                          const PP_Var& host_object);
 
-  // Retrieves the internal reference counts for testing. Returns 0 if we
-  // know about the object but the corresponding value is 0, or -1 if the
-  // given object ID isn't in our map.
-  int GetRefCountForObject(const PP_Var& plugin_object);
-  int GetTrackedWithNoReferenceCountForObject(const PP_Var& plugin_object);
-
  private:
   // VarTracker protected overrides.
   virtual int32 AddVarInternal(Var* var, AddVarRefMode mode) OVERRIDE;
   virtual void TrackedObjectGettingOneRef(VarMap::const_iterator iter) OVERRIDE;
   virtual void ObjectGettingZeroRef(VarMap::iterator iter) OVERRIDE;
   virtual bool DeleteObjectInfoIfNecessary(VarMap::iterator iter) OVERRIDE;
   virtual ArrayBufferVar* CreateArrayBuffer(uint32 size_in_bytes) OVERRIDE;
 
  private:
   friend struct DefaultSingletonTraits<PluginVarTracker>;
@@ skipping 37 matching lines @@
   typedef std::map<HostVar, int32> HostVarToPluginVarMap;
   HostVarToPluginVarMap host_var_to_plugin_var_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginVarTracker);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_