Remove PP_Module from parameters for PPB_Var.VarFromUtf8.

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 84e0b4c40eae7e4523b41ade444b47238be45fc6..ae6b7f7c4845bd9a2e7a0b1874da038873ffba50 100644
--- a/ppapi/proxy/host_var_serialization_rules.cc
+++ b/ppapi/proxy/host_var_serialization_rules.cc
@@ -33,7 +33,7 @@ PP_Var HostVarSerializationRules::BeginReceiveCallerOwned(
     Dispatcher* /* dispatcher */) {
   if (var.type == PP_VARTYPE_STRING) {
     // Convert the string to the context of the current process.
-    return var_interface_->VarFromUtf8(pp_module_, str_val->c_str(),
+    return var_interface_->VarFromUtf8(str_val->c_str(),
                                        static_cast<uint32_t>(str_val->size()));
   }
   return var;
@@ -51,7 +51,7 @@ 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(pp_module_, str_val.c_str(),
+    return var_interface_->VarFromUtf8(str_val.c_str(),
                                        static_cast<uint32_t>(str_val.size()));
   }