media: Introduce Renderer interface and RendererImpl.

media/base/renderer.cc

Index: media/base/renderer.cc
diff --git a/media/base/renderer.cc b/media/base/renderer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..22350ab1547ede2d7d4bf61c21952da96009f458
--- /dev/null
+++ b/media/base/renderer.cc
@@ -0,0 +1,19 @@
+// 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.
+
+#include "media/base/renderer.h"
+
+namespace media {
+
+Renderer::Renderer() {}
+
+Renderer::~Renderer() {}
+
+void Renderer::DisableUnderflowForTesting() {}
+
+void Renderer::SetTimeDeltaInterpolatorForTesting(
+    TimeDeltaInterpolator* interpolator) {
+}
+
+}  // namespace media