Adding third_party/openh264/src, build files and unittests

third_party/openh264/tests/openh264_unittests.gyp

Index: third_party/openh264/tests/openh264_unittests.gyp
diff --git a/third_party/openh264/tests/openh264_unittests.gyp b/third_party/openh264/tests/openh264_unittests.gyp
deleted file mode 100644
index 72143a316b5c041c842f607ba9d17a70b4f0f4b8..0000000000000000000000000000000000000000
--- a/third_party/openh264/tests/openh264_unittests.gyp
+++ /dev/null
@@ -1,22 +0,0 @@
-# Copyright 2015 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'openh264_unittests',
-      'type': '<(gtest_target_type)',
-      'include_dirs': [
-        '<(DEPTH)',
-        '<(DEPTH)/third_party',
-      ],
-      'dependencies': [
-        '<(DEPTH)/testing/gtest.gyp:gtest',
-      ],
-      'sources': [
-        'openh264_unittests.cc',
-      ],
-    },
-  ],
-}