Added MediaSourceState unit test.

media/base/gmock_callback_support.h

 // 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.
 
 #ifndef MEDIA_BASE_GMOCK_CALLBACK_SUPPORT_H_
 #define MEDIA_BASE_GMOCK_CALLBACK_SUPPORT_H_
 
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace media {
@@ skipping 10 matching lines @@
 
 // The RunClosure<N>() action invokes Run() method on the N-th (0-based)
 // argument of the mock function.
 
 ACTION_TEMPLATE(RunClosure,
                 HAS_1_TEMPLATE_PARAMS(int, k),
                 AND_0_VALUE_PARAMS()) {
   ::std::tr1::get<k>(args).Run();
 }
 
+ACTION_P(RunClosure, closure) {
+  closure.Run();
+}
+
 // Various overloads for RunCallback<N>().
 //
 // The RunCallback<N>(p1, p2, ..., p_k) action invokes Run() method on the N-th
 // (0-based) argument of the mock function, with arguments p1, p2, ..., p_k.
 //
 // Notes:
 //
 //   1. The arguments are passed by value by default.  If you need to
 //   pass an argument by reference, wrap it inside ByRef().  For example,
 //
@@ skipping 57 matching lines @@
 
 ACTION_TEMPLATE(RunCallback,
                 HAS_1_TEMPLATE_PARAMS(int, k),
                 AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6)) {
   return ::std::tr1::get<k>(args).Run(p0, p1, p2, p3, p4, p5, p6);
 }
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_GMOCK_CALLBACK_SUPPORT_H_