Ensure media's buffered ranges always have a range that includes currentTime.

media/base/ranges.cc

Index: media/base/ranges.cc
diff --git a/media/base/ranges.cc b/media/base/ranges.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b7b2b55adb893b62e07d213141eb49de6cd5e07c
--- /dev/null
+++ b/media/base/ranges.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 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/ranges.h"
+
+namespace media {
+
+template<>
+void Ranges<base::TimeDelta>::DCheckLT(const base::TimeDelta& lhs,
+                                       const base::TimeDelta& rhs) const {
+  DCHECK(lhs < rhs) << lhs.ToInternalValue() << " < " << rhs.ToInternalValue();
+}
+
+}  // namespace media