Remove PP_Module from parameters for PPB_Var.VarFromUtf8.

ppapi/proxy/ppp_messaging_proxy_unittest.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 <cstring>
 
 #include "base/synchronization/waitable_event.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/c/ppp_messaging.h"
@@ skipping 28 matching lines @@
 
 PPP_Messaging ppp_messaging_mock = {
   &HandleMessage
 };
 
 // Define a fake PPB_Var for the host side so that we can send a string var.
 void AddRef(PP_Var /*var*/) {
 }
 void Release(PP_Var /*var*/) {
 }
-PP_Var VarFromUtf8(PP_Module /*module*/, const char* /*data*/, uint32_t len) {
+PP_Var VarFromUtf8(const char* /*data*/, uint32_t len) {
   return PP_MakeUndefined();
 }
 // No matter what id we're given, always provide kTestString and its length.
 const std::string kTestString = "Hello world!";
 const char* VarToUtf8(PP_Var /*var*/, uint32_t* len) {
   *len = kTestString.size();
   return kTestString.c_str();
 }
 
 PPB_Var ppb_var_mock = {
@@ skipping 73 matching lines @@
   EXPECT_EQ(kTestString, received_string->value());
   // Now release the var, and the string should go away (because the ref
   // count should be one).
   plugin().var_tracker().ReleaseVar(received_var);
   EXPECT_FALSE(StringVar::FromPPVar(received_var));
 }
 
 }  // namespace proxy
 }  // namespace ppapi