Splitting media filter's Initialize() into Create() + callback and Seek() + callback.

media/base/mock_filters.cc

Index: media/base/mock_filters.cc
diff --git a/media/base/mock_filters.cc b/media/base/mock_filters.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7b854fccd0d5a605f94a439f4568f14169861627
--- /dev/null
+++ b/media/base/mock_filters.cc
@@ -0,0 +1,18 @@
+// Copyright (c) 2009 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/mock_filters.h"
+
+namespace media {
+
+void RunFilterCallback(::testing::Unused, FilterCallback* callback) {
+  callback->Run();
+  delete callback;
+}
+
+void DestroyFilterCallback(::testing::Unused, FilterCallback* callback) {
+  delete callback;
+}
+
+}  // namespace media