Add GetLiveVars to PPB_Testing_Dev. Fix leaks it uncovered.

ppapi/tests/test_video_decoder.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/tests/test_video_decoder.h"
 
 #include "ppapi/c/dev/ppb_video_decoder_dev.h"
 #include "ppapi/c/dev/ppb_testing_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/tests/testing_instance.h"
 
 REGISTER_TEST_CASE(VideoDecoder);
 
 bool TestVideoDecoder::Init() {
   video_decoder_interface_ = static_cast<const PPB_VideoDecoder_Dev*>(
       pp::Module::Get()->GetBrowserInterface(PPB_VIDEODECODER_DEV_INTERFACE));
-  return video_decoder_interface_ && InitTestingInterface();
+  return video_decoder_interface_ && CheckTestingInterface();
 }
 
 void TestVideoDecoder::RunTests(const std::string& filter) {
   RUN_TEST(CreateFailure, filter);
 }
 
 void TestVideoDecoder::QuitMessageLoop() {
   testing_interface_->QuitMessageLoop(instance_->pp_instance());
 }
 
 std::string TestVideoDecoder::TestCreateFailure() {
   PP_Resource decoder = video_decoder_interface_->Create(
       instance_->pp_instance(), 0, static_cast<PP_VideoDecoder_Profile>(-1));
   if (decoder != 0)
     return "Create: error detecting invalid context & configs";
 
   PASS();
 }