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

ppapi/proxy/host_var_serialization_rules.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/host_var_serialization_rules.h"
 
 #include "base/logging.h"
 #include "ppapi/c/ppb_var.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
+#include "ppapi/shared_impl/var.h"
+#include "ppapi/shared_impl/var_tracker.h"
+
+using ppapi::PpapiGlobals;
+using ppapi::StringVar;
+using ppapi::VarTracker;
 
 namespace ppapi {
 namespace proxy {
 
-HostVarSerializationRules::HostVarSerializationRules(
-    const PPB_Var* var_interface,
-    PP_Module pp_module)
-    : var_interface_(var_interface),
-      pp_module_(pp_module) {
+HostVarSerializationRules::HostVarSerializationRules(PP_Module pp_module)
+    : pp_module_(pp_module) {
 }
 
 HostVarSerializationRules::~HostVarSerializationRules() {
 }
 
 PP_Var HostVarSerializationRules::SendCallerOwned(const PP_Var& var,
                                                   std::string* str_val) {
   if (var.type == PP_VARTYPE_STRING)
     VarToString(var, str_val);
   return var;
 }
 
 PP_Var HostVarSerializationRules::BeginReceiveCallerOwned(
     const PP_Var& var,
     const std::string* str_val,
     Dispatcher* /* dispatcher */) {
-  if (var.type == PP_VARTYPE_STRING) {
-    // Convert the string to the context of the current process.
-    return var_interface_->VarFromUtf8(str_val->c_str(),
-                                       static_cast<uint32_t>(str_val->size()));
-  }
+  if (var.type == PP_VARTYPE_STRING)
+    return StringVar::StringToPPVar(*str_val);
   return var;
 }
 
 void HostVarSerializationRules::EndReceiveCallerOwned(const PP_Var& var) {
   if (var.type == PP_VARTYPE_STRING) {
     // Destroy the string BeginReceiveCallerOwned created above.
-    var_interface_->Release(var);
+    PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(var);
   }
 }
 
 PP_Var HostVarSerializationRules::ReceivePassRef(const PP_Var& var,
                                                  const std::string& str_val,
                                                  Dispatcher* /* dispatcher */) {
   if (var.type == PP_VARTYPE_STRING) {
     // Convert the string to the context of the current process.
-    return var_interface_->VarFromUtf8(str_val.c_str(),
-                                       static_cast<uint32_t>(str_val.size()));
+    return StringVar::StringToPPVar(str_val);
   }
 
   // See PluginVarSerialization::BeginSendPassRef for an example.
   if (var.type == PP_VARTYPE_OBJECT)
-    var_interface_->AddRef(var);
+    PpapiGlobals::Get()->GetVarTracker()->AddRefVar(var);
   return var;
 }
 
 PP_Var HostVarSerializationRules::BeginSendPassRef(const PP_Var& var,
                                                    std::string* str_val) {
   // See PluginVarSerialization::ReceivePassRef for an example. We don't need
   // to do anything here other than convert the string.
   if (var.type == PP_VARTYPE_STRING)
     VarToString(var, str_val);
   return var;
 }
 
 void HostVarSerializationRules::EndSendPassRef(const PP_Var& /* var */,
                                                Dispatcher* /* dispatcher */) {
   // See PluginVarSerialization::ReceivePassRef for an example. We don't need
   // to do anything here.
 }
 
 void HostVarSerializationRules::VarToString(const PP_Var& var,
                                             std::string* str) {
   DCHECK(var.type == PP_VARTYPE_STRING);
 
   // This could be optimized to avoid an extra string copy by going to a lower
   // level of the browser's implementation of strings where we already have
   // a std::string.
-  uint32_t len = 0;
-  const char* data = var_interface_->VarToUtf8(var, &len);
-  str->assign(data, len);
+  StringVar* string_var = StringVar::FromPPVar(var);
+  if (string_var)
+    *str = string_var->value();
 }
 
 void HostVarSerializationRules::ReleaseObjectRef(const PP_Var& var) {
-  var_interface_->Release(var);
+  PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(var);
 }
 
 }  // namespace proxy
 }  // namespace ppapi