Add GetLiveVars to PPB_Testing_Dev. Fix leaks it uncovered.

ppapi/tests/test_var.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_var.h"
 
 #include <string.h>
 
 #include <limits>
 
 #include "ppapi/c/dev/ppb_testing_dev.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/var.h"
 #include "ppapi/tests/testing_instance.h"
 
 namespace {
 
 uint32_t kInvalidLength = static_cast<uint32_t>(-1);
 
 }  // namespace
 
 REGISTER_TEST_CASE(Var);
 
 bool TestVar::Init() {
   var_interface_ = static_cast<const PPB_Var*>(
       pp::Module::Get()->GetBrowserInterface(PPB_VAR_INTERFACE));
-  return var_interface_ && InitTestingInterface();
+  return var_interface_ && CheckTestingInterface();
 }
 
 void TestVar::RunTests(const std::string& filter) {
   RUN_TEST(BasicString, filter);
   RUN_TEST(InvalidAndEmpty, filter);
   RUN_TEST(InvalidUtf8, filter);
   RUN_TEST(NullInputInUtf8Conversion, filter);
   RUN_TEST(ValidUtf8, filter);
   RUN_TEST(Utf8WithEmbeddedNulls, filter);
   RUN_TEST(VarToUtf8ForWrongType, filter);
@@ skipping 88 matching lines @@
   // Now convert it back.
   uint32_t length = kInvalidLength;
   const char* result = NULL;
   result = var_interface_->VarToUtf8(converted_string, &length);
   if (length != 0) {
     return "Expected 0 length string on conversion.";
   }
   if (result == NULL) {
     return "Expected a non-null result for 0-lengthed string from VarToUtf8.";
   }
+  var_interface_->Release(converted_string);
 
   // Should not crash, and make an empty string.
   const char* null_string = NULL;
   pp::Var null_var(null_string);
   if (!null_var.is_string() || null_var.AsString() != "") {
     return "Expected NULL input to make an empty string Var.";
   }
 
   PASS();
 }
@@ skipping 93 matching lines @@
   if (length != 0) {
     return "Expected 0 on string conversion from Double var.";
   }
   if (result != NULL) {
     return "Expected NULL on string conversion from Double var.";
   }
 
   PASS();
 }