Remove unused in-process pepper APIs

ppapi/tests/test_scrollbar.h

-// 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.
-
-#ifndef PAPPI_TESTS_TEST_SCROLLBAR_H_
-#define PAPPI_TESTS_TEST_SCROLLBAR_H_
-
-#include "ppapi/cpp/dev/scrollbar_dev.h"
-#include "ppapi/cpp/dev/widget_client_dev.h"
-#include "ppapi/cpp/dev/widget_dev.h"
-#include "ppapi/tests/test_case.h"
-
-class TestScrollbar : public TestCase,
-                      public pp::WidgetClient_Dev {
- public:
-  TestScrollbar(TestingInstance* instance);
-
-  // TestCase implementation.
-  virtual bool Init();
-  virtual void RunTests(const std::string& filter);
-
- private:
-  std::string TestHandleEvent();
-
-  virtual void InvalidateWidget(pp::Widget_Dev widget,
-                                const pp::Rect& dirty_rect);
-  virtual void ScrollbarValueChanged(pp::Scrollbar_Dev scrollbar,
-                                     uint32_t value);
-  virtual void ScrollbarOverlayChanged(pp::Scrollbar_Dev scrollbar,
-                                       bool type);
-
-  pp::Scrollbar_Dev scrollbar_;
-  bool scrollbar_value_changed_;
-};
-
-#endif  // PAPPI_TESTS_TEST_SCROLLBAR_H_