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

ppapi/proxy/host_var_serialization_rules.cc

Index: ppapi/proxy/host_var_serialization_rules.cc
diff --git a/ppapi/proxy/host_var_serialization_rules.cc b/ppapi/proxy/host_var_serialization_rules.cc
index ae6b7f7c4845bd9a2e7a0b1874da038873ffba50..14615263aa4da97ed813d63fbcb3e37a2ef4b890 100644
--- a/ppapi/proxy/host_var_serialization_rules.cc
+++ b/ppapi/proxy/host_var_serialization_rules.cc
@@ -6,15 +6,19 @@
 
 #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() {
@@ -32,9 +36,7 @@ PP_Var HostVarSerializationRules::BeginReceiveCallerOwned(
     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);
   }
   return var;
 }
@@ -42,7 +44,7 @@ PP_Var HostVarSerializationRules::BeginReceiveCallerOwned(
 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);
   }
 }
 
@@ -51,13 +53,12 @@ PP_Var HostVarSerializationRules::ReceivePassRef(const PP_Var& var,
                                                  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;
 }
 
@@ -83,13 +84,13 @@ void HostVarSerializationRules::VarToString(const PP_Var& var,
   // 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