cmake: Integrate new parsing API and tests.

Change-Id: I11e32bfffda12fa910c06bf7b8e3a0efbccf6054

webm_parser/tests/webm_parser_tests.cc

@@ -0,0 +1,13 @@
+// Copyright (c) 2016 The WebM project authors. All Rights Reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree. An additional intellectual property rights grant can be found
+// in the file PATENTS.  All contributing project authors may
+// be found in the AUTHORS file in the root of the source tree.
+#include "gtest/gtest.h"
+
+int main(int argc, char* argv[]) {
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}