Fix/Add content_unittests to work for the code behind --enable-audio-track-processing

content/renderer/media/mock_media_constraint_factory.h

Index: content/renderer/media/mock_media_constraint_factory.h
diff --git a/content/renderer/media/mock_media_constraint_factory.h b/content/renderer/media/mock_media_constraint_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..6eb261a42f71afde5123ac39272761f88607cfe5
--- /dev/null
+++ b/content/renderer/media/mock_media_constraint_factory.h
@@ -0,0 +1,34 @@
+// Copyright 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 CONTENT_RENDERER_MEDIA_MOCK_MEDIA_STREAM_CONSTRAINT_H_
+#define CONTENT_RENDERER_MEDIA_MOCK_MEDIA_STREAM_CONSTRAINT_H_
+
+#include <string>
+#include <vector>
+
+#include "third_party/WebKit/public/platform/WebMediaConstraints.h"
+
+namespace content {
+
+class MockMediaConstraintFactory {
+ public:
+  MockMediaConstraintFactory();
+  ~MockMediaConstraintFactory();
+
+  blink::WebMediaConstraints CreateWebMediaConstraints();
+  void AddMandatory(const std::string& key, int value);
+  void AddMandatory(const std::string& key, double value);
+  void AddOptional(const std::string& key, int value);
+  void AddOptional(const std::string& key, double value);
+  void DisableDefaultAudioConstraints();
+
+ private:
+  std::vector<blink::WebMediaConstraint> mandatory_;
+  std::vector<blink::WebMediaConstraint> optional_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_MOCK_MEDIA_STREAM_CONSTRAINT_H_