Add content type extension to capabilities

webrtc/media/engine/webrtcvideoengine2_unittest.cc

 /*
  *  Copyright (c) 2004 The WebRTC 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.
  */
 
@@ skipping 255 matching lines @@
 
   // Verify capturer has turned off applying rotation.
   EXPECT_FALSE(capturer.apply_rotation());
 
   // Verify removing header extension turns on applying rotation.
   parameters.extensions.clear();
   EXPECT_TRUE(channel->SetSendParameters(parameters));
   EXPECT_TRUE(capturer.apply_rotation());
 }
 
+
+// TODO(ilnik): Remove this test once field trial is gone.
+TEST_F(WebRtcVideoEngine2Test, SupportsVideoContentTypeHeaderExtension) {
+  // Extension shound not be reported outside of the field trial.
+  RtpCapabilities capabilities = engine_.GetCapabilities();
+  EXPECT_FALSE(capabilities.header_extensions.empty());
+  for (const RtpExtension& extension : capabilities.header_extensions) {
+    EXPECT_NE(extension.uri, RtpExtension::kVideoContentTypeUri);
+  }
+  webrtc::test::ScopedFieldTrials override_field_trials_(
+        "WebRTC-VideoContentTypeExtension/Enabled/");
+  // Should be reported within field trial.
+  capabilities = engine_.GetCapabilities();
+  EXPECT_FALSE(capabilities.header_extensions.empty());
+  for (const RtpExtension& extension : capabilities.header_extensions) {
+    if (extension.uri == RtpExtension::kVideoContentTypeUri) {
+      EXPECT_EQ(RtpExtension::kVideoContentTypeDefaultId, extension.id);
+      return;
+    }
+  }
+  FAIL() << "Video Content Type extension not in header-extension list.";
+}
+
 TEST_F(WebRtcVideoEngine2Test, CVOSetHeaderExtensionBeforeAddSendStream) {
   // Allocate the capturer first to prevent early destruction before channel's
   // dtor is called.
   cricket::FakeVideoCapturer capturer;
 
   cricket::FakeWebRtcVideoEncoderFactory encoder_factory;
   encoder_factory.AddSupportedVideoCodecType("VP8");
 
   std::unique_ptr<VideoMediaChannel> channel(
       SetUpForExternalEncoderFactory(&encoder_factory));
@@ skipping 4105 matching lines @@
 
 TEST_F(WebRtcVideoChannel2SimulcastTest,
        NoSimulcastScreenshareWithoutConference) {
   webrtc::test::ScopedFieldTrials override_field_trials_(
       "WebRTC-SimulcastScreenshare/Enabled/");
   VerifySimulcastSettings(cricket::VideoCodec("VP8"), 1280, 720, 3, 1, true,
                           false);
 }
 
 }  // namespace cricket