Revert of Minor changes to allow Pepper InstancePrivate tests to pass with gin

ppapi/tests/test_instance_deprecated.h

 // Copyright (c) 2012 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.
 
 #ifndef PPAPI_TESTS_TEST_INSTANCE_H_
 #define PPAPI_TESTS_TEST_INSTANCE_H_
 
 #include <string>
 #include <vector>
 
 #include "ppapi/tests/test_case.h"
 
 class TestInstance : public TestCase {
  public:
   TestInstance(TestingInstance* instance);
   virtual ~TestInstance();
 
   // TestCase implementation.
   virtual bool Init();
   virtual void RunTests(const std::string& filter);
 
   void set_string(const std::string& s) { string_ = s; }
 
   // Leak a reference to the given var, but ignore the leak in the leak checking
   // that happens at shutdown. This allows us to test the "ForceFree" that
   // happens on instance shutdown.
   void LeakReferenceAndIgnore(const pp::Var& leaked);
 
-  void set_instance_object_destroyed(bool destroyed) {
-    instance_object_destroyed_ = destroyed;
-  }
-
  protected:
   // Test case protected overrides.
   virtual pp::deprecated::ScriptableObject* CreateTestObject();
 
  private:
   std::string TestExecuteScript();
   std::string TestRecursiveObjects();
   std::string TestLeakedObjectDestructors();
   std::string TestSetupExecuteScriptAtInstanceShutdown();
   std::string TestExecuteScriptAtInstanceShutdown();
 
   // Value written by set_string which is called by the ScriptableObject. This
   // allows us to keep track of what was called.
   std::string string_;
-
-  // Whether the instance object for this instance has been destroyed.
-  bool instance_object_destroyed_;
 };
 
 #endif  // PPAPI_TESTS_TEST_INSTANCE_H_