Apply new-style constraints to video_source.

content/renderer/media/mock_constraint_factory.cc

Index: content/renderer/media/mock_constraint_factory.cc
diff --git a/content/renderer/media/mock_constraint_factory.cc b/content/renderer/media/mock_constraint_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4e2b4142d29d471c411a4a3288d3388f07b6453c
--- /dev/null
+++ b/content/renderer/media/mock_constraint_factory.cc
@@ -0,0 +1,32 @@
+// Copyright 2016 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.
+
+#include <stddef.h>
+
+#include "base/macros.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/utf_string_conversions.h"
+#include "content/renderer/media/media_stream_audio_processor_options.h"
+#include "content/renderer/media/mock_constraint_factory.h"
+#include "third_party/libjingle/source/talk/app/webrtc/mediaconstraintsinterface.h"
+
+namespace content {
+
+MockConstraintFactory::MockConstraintFactory() {}
+
+MockConstraintFactory::~MockConstraintFactory() {}
+
+blink::WebMediaTrackConstraintSet& MockConstraintFactory::AddAdvanced() {
+  advanced_.emplace_back();
+  return advanced_.back();
+}
+
+blink::WebMediaConstraints MockConstraintFactory::CreateWebMediaConstraints()
+    const {
+  blink::WebMediaConstraints constraints;
+  constraints.initialize(basic_, advanced_);
+  return constraints;
+}
+
+}  // namespace content