Add GetLiveVars to PPB_Testing_Dev. Fix leaks it uncovered.

ppapi/tests/test_graphics_3d.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_graphics_3d.h"
 
 #include <GLES2/gl2.h>
 
 #include "ppapi/c/dev/ppb_testing_dev.h"
 #include "ppapi/c/ppb_opengles2.h"
 #include "ppapi/cpp/graphics_3d.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/tests/test_utils.h"
 #include "ppapi/tests/testing_instance.h"
 
 REGISTER_TEST_CASE(Graphics3D);
 
 bool TestGraphics3D::Init() {
   opengl_es2_ = static_cast<const PPB_OpenGLES2*>(
       pp::Module::Get()->GetBrowserInterface(PPB_OPENGLES2_INTERFACE));
-  return opengl_es2_ && InitTestingInterface();
+  return opengl_es2_ && CheckTestingInterface();
 }
 
 void TestGraphics3D::RunTests(const std::string& filter) {
   RUN_TEST(Frame, filter);
 }
 
 std::string TestGraphics3D::TestFrame() {
   const int width = 16;
   const int height = 16;
   const int32_t attribs[] = {
@@ skipping 34 matching lines @@
   opengl_es2_->ReadPixels(context->pp_resource(),
       x, y, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel_color);
 
   ASSERT_EQ(pixel_color[0], expected_color[0]);
   ASSERT_EQ(pixel_color[1], expected_color[1]);
   ASSERT_EQ(pixel_color[2], expected_color[2]);
   ASSERT_EQ(pixel_color[3], expected_color[3]);
   PASS();
 }