Revert of Revert of Implement software fallback for PPB_VideoDecoder.

ppapi/tests/test_video_decoder.h

+// Copyright (c) 2014 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_VIDEO_DECODER_H_
+#define PPAPI_TESTS_TEST_VIDEO_DECODER_H_
+
+#include <string>
+
+#include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/ppb_video_decoder.h"
+#include "ppapi/cpp/graphics_3d.h"
+#include "ppapi/tests/test_case.h"
+
+class TestVideoDecoder : public TestCase {
+ public:
+  explicit TestVideoDecoder(TestingInstance* instance) : TestCase(instance) {}
+
+ private:
+  // TestCase implementation.
+  virtual bool Init();
+  virtual void RunTests(const std::string& filter);
+
+  std::string TestCreate();
+
+  // Used by the tests that access the C API directly.
+  const PPB_VideoDecoder_0_1* video_decoder_interface_;
+
+  pp::Graphics3D graphics_3d_;
+};
+
+#endif  // PPAPI_TESTS_TEST_VIDEO_DECODER_H_